269 results on '"Brevipalpus phoenicis"'
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2. Mite Species Exceeding the Economic Damage Threshold in the Tea Plantation Areas in Türkiye and Population Dynamics in the 2nd and 3rd Harvesting Periods.
- Author
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YAZICI, Feyza and AKINER, Muhammet Mustafa
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MITES ,POPULATION dynamics ,POPULATION bottleneck ,FALSE spider mites ,MONOCYTES - Abstract
Copyright of Journal of Anatolian Environmental & Animal Science is the property of Bulent Verep and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2024
- Full Text
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3. Resistance to spirodiclofen in Brevipalpus yothersi (Acari: Tenuipalpidae) from Brazilian citrus groves: detection, monitoring, and population performance.
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Rocha, Claudiane, Della Vechia, Jaqueline, Savi, Patrice, Omoto, Celso, and Andrade, Daniel
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ACARICIDES ,CITRUS ,SURVIVAL rate ,MITES ,OVIPARITY ,ORANGES ,MITE control - Abstract
BACKGROUND: Brevipalpus yothersi mite is the main vector of Citrus leprosis virus (CiLV), the causal agent of citrus leprosis disease. The acaricide spirodiclofen has been widely used to control this mite. However, failures in control using spirodiclofen have been frequently reported by citrus growers. In this study, we estimated the diagnostic concentration to monitor the resistance to spirodiclofen of B. yothersi populations collected in nine citrus groves in Brazil. We then selected the B. yothersi population that showed lowest mortality with the estimated diagnostic concentration of spirodiclofen to characterize the frequency of resistant individuals, as well as demographic and life table parameters. RESULTS: Variability was higher between populations in terms of susceptibility to spirodiclofen. The frequency of resistant eggs between populations ranged from 0.7% to 85.8%. The resistance ratio of B. yothersi to spirodiclofen was low to moderate. Survival rates of the immature stage, total adult longevity, oviposition days, and female fecundity were lower in the resistant strain. Furthermore, net reproduction rate, intrinsic rate of increase, finite rate of increase, and mean length of a generation were also lower in the R strain. CONCLUSION: Although variations in resistance to spirodiclofen were observed between populations, the resistance ratio was low to moderate. Such data can be useful in the development of resistance management strategies for B. yothersi in Brazilian citrus groves. © 2021 Society of Chemical Industry. [ABSTRACT FROM AUTHOR]
- Published
- 2021
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4. REPRODUCTIVE INTERPRETATION OF SOME BREVIPALPUS SPECIES ON TWO TEMPERATURES DEGREE, USING LIFE TABLE PARAMETERS.
- Author
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Ebrahim A. A., Abdallah A. A. M., and Halawa A.
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BREVIPALPUS ,FALSE spider mites ,CITRUS fruits ,FRUIT development ,LIFE tables ,ORANGE varieties - Abstract
Genus Brevipalpus is considered one of the most important genera that belong to family Tenuipalpidae Berlese. In Egypt, Brevipalpus includes seven species solely, five of them are attacking citrus trees. B. phoenicis, B. californicus and B. noranae are the most dominant on Egyptian citrus. A pure culture of the three species were propagated on leaves of Common Navel orange variety. The mentioned species were studied at two different temperatures (25 and 30°C ± 2°C and 70 ± 5% R.H.). The obtained results enable us to conclude that between the three species of genus Brevipalpus, the citrus fruit most appropriate for the development of B. noranae, since the mite presents a reduced embryonic and post-embryonic period. The citrus fruit also provides the highest values of specific fertility, survival and of the intrinsic increase rate (rm), which indicates it as being a better suitable host for the mite which provide B. noranae to establish and rapid spread. [ABSTRACT FROM AUTHOR]
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- 2021
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5. Biological Aspects and Life Table Parameters of the Predatory Mite, Neoseiulus californicus McGregor (Acari: Phytoseiidae) Reared on Different Diets.
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Roshdy, Ola M., Zaid, Walaa R. Abou, and Refaei, Ghada S.
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MITES ,PHYTOSEIIDAE ,BREVIPALPUS ,DATE palm ,TWO-spotted spider mite - Abstract
Copyright of Journal of Plant Protection & Pathology is the property of Egyptian National Agricultural Library (ENAL) and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2019
- Full Text
- View/download PDF
6. IMPACT OF RAINFALLS ON THE ACARICIDE PROPARGITE WITH AND WITHOUT ADDITION OF ADJUVANTS FOR THE CONTROL OF THE MITE Brevipalpus yothersi
- Author
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Jessica Josefa Sanches, Marcelo da Costa Ferreira, and Daniel Junior de Andrade
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Leprose-dos-citros ,Citrus sinensis ,CiLV ,Brevipalpus phoenicis ,Depósito de calda ,Plant culture ,SB1-1110 - Abstract
ABSTRACT Rainfalls may affect the efficiency of pesticides due to a decreased deposit of active ingredient on plants. This should be considered in spraying with acaricides, the main strategy used for the management of citrus leprosis, the main viral disease of the Brazilian citrus culture. Citrus leprosis disease is transmitted by Brevipalpus mites, mainly B. yothersi. The objective of this study was to evaluate the effects of artificial rains on the efficiency of the acaricide propargite in combination or not with adjuvants for the control of the mite B. yothersi. The experiment was conducted using orange plants grown in pots kept under greenhouse conditions. The acaricide propargite was evaluated isolated and with addition of the adjuvants polydimethylsiloxane (20mL cp/100 L of water) and a mixture of phosphatidylcholine (lecithin) and propionic acid (500 mL cp/100 L of water). After the application of the acaricide with and without the adjuvants, the plants were subjected to a 10-mm artificial rainfall at different time intervals: 5 minutes, and 1 and 12 hours after application. Thereafter, B. yothersi mites were transferred to plants for survival evaluation. The artificial rainfall affected negatively the efficiency of propargite isolated and in mixture. The addition of the adjuvant phosphatidylcholine and propionic acid impaired the efficiency of propargite due to an increased runoff of the broth and a decrease in the deposit of active ingredients on plants. We conclude that the acaricide propargite should not be used in combination with the adjuvants polydimethylsiloxane and mixture of phosphatidylcholine and propionic acid in rainy conditions.
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- 2018
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7. Laporan baru tungau Tarsonemus bilobatus Suski dan karakter utama tungau lain pada daun tanaman jeruk di Pulau Jawa, Indonesia
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Sugeng Santoso, Hendri Hermawan, and Aunu Rauf
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Phytoseiidae ,mites ,biology ,quarantine ,Amblyseius ,Tenuipalpidae ,biology.organism_classification ,Eriophyidae ,citrus ,Horticulture ,QL1-991 ,Tarsonemus ,new report ,morphology ,Mite ,Brevipalpus phoenicis ,Tydeidae ,Zoology - Abstract
Citrus is one of the most important fruit crops in Indonesia. One of the main problems in citrus production is mite infestation. Many mite species were reported attacking citrus around the world. This study was aimed to identify mites and describe the main characters of various species of mites on citrus in Java, Indonesia. Sampling was carried out at the location of citrus plantations and citrus plants in the yard of the house which was carried out purposively. In a large planting area, sampling was carried out on 10 citrus trees that showed symptoms of mite attack. The identification process is carried out by a mounting process to obtain specimens that can be observed under a compound microscope using PVA. Eight species of mites were collected from 8 various of citrus from 15 location. Six mites species were identified as phytophagous, i.e., Panonychus citri McGregor, Eotetranychus sp., Eutetranychus sp. (Family Tetranychidae), Brevipalpus phoenicis (Geijskes) (Family Tenuipalpidae), Tarsonemus bilobatus Suski (Family Tarsonemidae), and Phyllocoptruta oleivora (Ashmead) (Family Eriophyidae). Meanwhile, the other two species, Amblyseius sp. (Family Phytoseiidae) and Cheletogenes ornatus (Canestrini & Fanzago) (Family Cheyletidae) were predators. Unidentified mites were Family Tydeidae and Winterschmidtiidae. According to Regulation No. 31 of 2018, P. citri and Ph. oleivora are quarantine pest. T. bilobatus is firstly reported in Indonesia.
- Published
- 2021
8. Life history of the flat-mite, Brevipalpus phoenicis (Geijskes) (Acari: Prostigmata: Tenuipalpidae) on Navel orange variety (Citrus sinensis (L.)).
- Author
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EL-Sebaay, Mamduoh M.
- Subjects
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BREVIPALPUS , *FALSE spider mites , *INSECT fertility , *LIFE cycles (Biology) , *TEMPERATURE - Abstract
Biology of Brevipalpus phoenicis (Geijskes, 1936) was studied on leaves of navel orange at two temperature degrees 25 and 30°C and 70 % R.H. The lengths of embryonic and post-embryonic period were affected by due to the temperature degrees, where the mite was showed better development and higher fecundity at 30°C and 70 % R.H. The total immature time was averaged 16.32 & 14.23 day and 12.93 & 12.04 day for females and males at temperature degrees 25 and 30°C, respectively, while the life cycle was averaged 24.32 & 21.73 and 19.03 &17.94 day for females and males at temperature degrees 25 and 30°C, respectively. In addition, the fecundity of B. phoenicis was affected by temperature degrees where it averaged 11.66 & 16.23 eggs/female by daily rate 21.24 & 2.12 egg / female/day at temperature degrees 25 and 30°C, respectively. [ABSTRACT FROM AUTHOR]
- Published
- 2018
9. Resistance to spirodiclofen in Brevipalpus yothersi ( <scp>Acari: Tenuipalpidae</scp> ) from <scp>Brazilian</scp> citrus groves: detection, monitoring, and population performance
- Author
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Daniel Júnior de Andrade, Celso Omoto, Claudiane Martins da Rocha, Jaqueline Franciosi Della Vechia, Patrice Jacob Savi, Universidade Estadual Paulista (Unesp), and Universidade de São Paulo (USP)
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0106 biological sciences ,Citrus ,Brevipalpus phoenicis ,ketoenol ,Population ,Tenuipalpidae ,Biology ,01 natural sciences ,Toxicology ,4-Butyrolactone ,Citrus leprosis virus (CiLV) ,Animals ,Spiro Compounds ,Citrus leprosis disease ,Population dynamics ,education ,Mites ,education.field_of_study ,Acaricide ,food and beverages ,General Medicine ,Fecundity ,biology.organism_classification ,010602 entomology ,VÍRUS DE PLANTAS ,Insect Science ,Female ,Agronomy and Crop Science ,Brazil ,Citrus × sinensis ,Citrus sinensis ,010606 plant biology & botany - Abstract
Made available in DSpace on 2021-06-25T10:25:15Z (GMT). No. of bitstreams: 0 Previous issue date: 2021-01-01 BACKGROUND: Brevipalpus yothersi mite is the main vector of Citrus leprosis virus (CiLV), the causal agent of citrus leprosis disease. The acaricide spirodiclofen has been widely used to control this mite. However, failures in control using spirodiclofen have been frequently reported by citrus growers. In this study, we estimated the diagnostic concentration to monitor the resistance to spirodiclofen of B. yothersi populations collected in nine citrus groves in Brazil. We then selected the B. yothersi population that showed lowest mortality with the estimated diagnostic concentration of spirodiclofen to characterize the frequency of resistant individuals, as well as demographic and life table parameters. RESULTS: Variability was higher between populations in terms of susceptibility to spirodiclofen. The frequency of resistant eggs between populations ranged from 0.7% to 85.8%. The resistance ratio of B. yothersi to spirodiclofen was low to moderate. Survival rates of the immature stage, total adult longevity, oviposition days, and female fecundity were lower in the resistant strain. Furthermore, net reproduction rate, intrinsic rate of increase, finite rate of increase, and mean length of a generation were also lower in the R strain. CONCLUSION: Although variations in resistance to spirodiclofen were observed between populations, the resistance ratio was low to moderate. Such data can be useful in the development of resistance management strategies for B. yothersi in Brazilian citrus groves. Department of Agricultural Sciences São Paulo State University (UNESP) - College of Agricultural and Veterinary Sciences Department of Entomology and Acarology University of São Paulo (ESALQ/USP) Department of Agricultural Sciences São Paulo State University (UNESP) - College of Agricultural and Veterinary Sciences
- Published
- 2021
10. Análise temporal e controle da mancha-anular e do ácaro vetor do Coffee ringspot virus
- Author
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João Eduardo Melo de Almeida, Arnaldi Eiki Mori, Edson Ampélio Pozza, Paulo Rebelles Reis, and Antonia dos Reis Figueira
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Brevipalpus phoenicis ,acaricidas ,análise de correlação ,vetor ,Agriculture (General) ,S1-972 - Abstract
O objetivo deste trabalho foi avaliar a flutuação populacional do ácaro Brevipalpus phoenicis, vetor do Coffee ringspot virus (CoRSV) - agente causal da mancha-anular do cafeeiro -, bem como a sua distribuição em plantas de café e o efeito de acaricidas no seu controle em lavouras cafeeiras. O experimento foi realizado no Município de Coromandel, na região do Alto do Paranaíba, MG, durante dois anos. No segundo ano, avaliou-se o progresso da doença, e determinou-se a relação entre o crescimento populacional do ácaro e a incidência da doença. Observou-se que a mancha-anular e o ácaro ocorreram durante todo o ano, com maiores populações e incidência da doença nos meses com menores índices pluviais e temperaturas amenas. As análises de Pearson mostraram correlação negativa entre os parâmetros climáticos e a população do ácaro. Na análise da incidência da doença em diferentes épocas, verificou-se correlação positiva entre a primeira avaliação e as avaliações subsequentes. Quanto à distribuição espacial, foi observada a presença do ácaro em toda a planta; porém, as folhas são preferidas pelos adultos, enquanto os frutos são preferidos para oviposição. Os acaricidas são eficientes para manter a população do ácaro em baixos níveis, com consequente diminuição da incidência da doença.
- Published
- 2012
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11. Acaricidas utilizados na citricultura convencional e orgânica: manejo da leprose e populações de ácaros fitoseídeos
- Author
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Daniel Júnior de Andrade, Carlos Amadeu Leite de Oliveira, Fernando César Pattaro, and Diego Silva Siqueira
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Brevipalpus phoenicis ,Vírus da leprose dos citros - CiLV ,Citrus sinensis e Seletividade ,Citrus Leprosis Virus - CiLV ,Citrus sinensis ,Selectivity ,Plant culture ,SB1-1110 - Abstract
O controle da leprose dos citros no Estado de São Paulo é realizado quase que exclusivamente com aplicações de acaricidas para o controle do ácaro vetor Brevipalpus phoenicis, as quais contribuem para o aumento dos custos de produção e podem afetar negativamente as populações de organismos benéficos. Portanto, o objetivo do trabalho foi avaliar, durante quatro safras, os efeitos de acaricidas indicados para o controle do ácaro B. phoenicis em citros convencional e orgânico sobre a evolução da leprose dos citros e sobre ácaros fitoseídeos. O experimento foi instalado em outubro de 2003, em pomar de laranja localizado no município de Reginópolis-SP. O delineamento experimental foi em blocos casualizados, estabelecendo-se os tratamentos, expressos em mL de p.c./100 L de água: spirodiclofen a 20 mL e cyhexatin a 50 mL (aplicados em rotação), calda sulfocálcica a 4.000 mL e testemunha sem aplicação de acaricidas. Entretanto, a rotação entre spirodiclofen e cyhexatin iniciou-se em setembro de 2006 e, anteriormente a esse período, utilizou-se somente o spirodiclofen. A cada quinze dias, foram realizados levantamentos populacionais do ácaro B. phoenicis e dos ácaros predadores Iphiseiodes zuluagai e os do gênero Euseius. O nível de controle adotado para o B. phoenicis foi de 8,3%, sendo que as aplicações dos produtos foram realizadas com pulverizador de arrasto tratorizado munido com lanças manuais. Na safra de 2007-2008, coletaram-se 10 frutos caídos devido à leprose por parcela e quantificou-se o número de lesões de leprose presentes em cada fruto. Avaliaram-se, ao término da safra de 2007-2008, a produtividade, as perdas devido à leprose, bem como a incidência e a severidade da leprose. Constatou-se que o local das lesões no fruto é mais importante para determinar sua queda do que o número de lesões presentes. Quanto mais intensa a infestação do ácaro B. phoenicis, maior é o número de lesões de leprose, resultando em maior queda prematura de frutos. Os acaricidas spirodiclofen e cyhexatin e spirodiclofen em rotação proporcionaram controle mais eficiente de B. phoenicis, em relação à calda sulfocálcica, resultando em maior produtividade, menores perdas de frutos e nos menores níveis de severidade da leprose. As aplicações de calda sulfocálcica reduziram os níveis populacionais do ácaro B. phoenicis abaixo do nível de controle, porém não evitaram o surgimento de lesões de leprose. As aplicações dos acaricidas apresentaram efeito nocivo sobre os ácaros fitoseídeos, pois houve redução da densidade populacional.The citrus leprosis control in São Paulo state is performed exclusively by acaricides to control the vector mite, Brevipalpus phoenicis, which increases the production costs and may affect the beneficial organism's population. Therefore, the aim of this trial was to evaluate during four seasons, the effects of acaricides recommended to control the mite B. phoenicis in conventional and organic citrus over evolution of citrus leprosis and over phytoseiids' population. The experiment was installed in October of 2003 in a citrus orchard in Reginópolis city, state of São Paulo. The experimental design used randomized blocks, the dosages was expressed as mL c.p./ 100 L of water and the treatments were the following: spirodiclofen (20 mL); cyhexatin (50 mL) (used in rotation), lime sulfur (4,000 mL) and control (without pesticide application). However, the rotation between spirodiclofen and cyhexatin began in September 2006. Prior to that time, only spirodiclofen had been used. Surveys were conducted every 15 days on the B. phoenicis, Iphiseioides zuluagai,and Euseius populations. The control level adopted by the B. phoenicis was 8.3%, and the pesticide applications were conducted using tractor-sprayers. During the 2007-08 seasons, 10 infected fallen fruits per plot were collected and the number of leprosis lesions was quantified by each fruit. By the end of the 2007-08 seasons, the productivity, harvest losses, the disease incidence and severity were evaluated. It was found that the lesions' location over the fruit is more important in determining its drop than the lesions' number. The more intense the mite infestation, the greater is the number of lesions, resulting in increased premature fruit drop. A strategy using acaricides spirodiclofen and cyhexatin in rotation promoted more efficient control of B. phoenicis compared to lime sulfur, resulting in greater productivity, lower fruit losses and severity levels. The lime sulfur applications reduced the mite population incidence below the control level; however it did not prevent the lesions' occurrence. The acaricides applications prevented adverse effects on phytoseiid population because there was a reduction of their density.
- Published
- 2010
12. Modelo autologístico espaço-temporal com aplicação à análise de padrões espaciais da leprose-dos-citros Spatial temporal autologistic model with an application to the analysis of spatial patterns of citrus leprosis
- Author
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Luziane Franciscon, Paulo Justiniano Ribeiro Junior, Elias Teixeira Krainski, Renato Beozzo Bassanezi, and Ana Beatriz Costa Czermainski
- Subjects
Brevipalpus phoenicis ,Citrus leprosis virus ,Citrus sinensis ,estatística espacial ,estruturas de vizinhança ,pseudo-verossimilhança ,spatial statistics ,neighbor structures ,pseudo-likelihood ,Agriculture (General) ,S1-972 - Abstract
O objetivo deste trabalho foi propor estratégias de modelagem aplicadas aos dados de incidência de leprose-dos-citros, por meio do uso de um modelo autologístico espaço-temporal. A adequação do modelo autologístico foi avaliada quanto à: análise de dados provenientes de avaliações feitas em diferentes momentos; detecção de padrões espaciais da doença, pela avaliação de diferentes estruturas de vizinhança; consideração do efeito defasado no tempo de covariáveis de vizinhança; e ao efeito do ácaro transmissor na probabilidade de nova infecção. O modelo autologístico espaço-temporal adotado estendeu o modelo logístico usual, em que a estrutura de vizinhança é descrita por meio da construção de covariáveis, a partir da resposta observada em plantas vizinhas à planta avaliada, na mesma avaliação, ou em avaliações anteriores. Os dados de incidência de leprose nas plantas de citros foram coletados em pontos referenciados no espaço, durante aproximadamente dois anos. Os modelos detectam o efeito da presença do vetor e os padrões espaciais na ocorrência de novas infecções, tanto para covariáveis de vizinhança da mesma avaliação, quanto para covariáveis de vizinhança da avaliação anterior. Além disso, os modelos considerados permitem quantificar as variações na probabilidade de ocorrência da doença de acordo com o estado da doença e com a incidência do ácaro transmissor.The goal of this study was to propose modeling strategies applied to the analysis of citrus leprosis incidence, through the use of a spatial temporal autologistic model. We evaluated the adequacy of autologistic model to consider data collected at different times; to detect spatial-temporal patterns through different neighboring structures; to consider the effect of covariates from previous times; and assessing the effect of the presence of the disease vector in the probability of new infections occurrence. The spatial temporal autologistic model adopted has extended the usual logistic model, in which the neighboring structures is described by means of covariates built from the status of plants nearby, at the same or at previous times. Data regarding the presence of the leprosis on plants were collected at field points referenced in space, over a period of approximately two years. Models detect the presence of spatial patterns on new infections for the studied neighboring structures, at the same or previous time. Additionally, probability estimates of a plant become infected can be obtained from the fitted models, given the occurrence of the disease and vector.
- Published
- 2008
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13. Resposta diferencial de espécies e de híbridos de citros à leprose Differential response of citrus species and hybrids to leprosis
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Juliana Freitas-Astúa, André Luiz Fadel, Marinês Bastianel, Valdenice Moreira Novelli, Renata Antonioli-Luizon, and Marcos Antônio Machado
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Brevipalpus phoenicis ,Citrus spp. ,CiLV ,melhoramento genético ,resistência genética ,genetic improvement ,genetic resistance ,Agriculture (General) ,S1-972 - Abstract
O objetivo deste trabalho foi buscar novas fontes de resistência à leprose-dos-citros, no Banco Ativo de Germoplasma do Centro APTA Citros Sylvio Moreira, Instituto Agronômico, em Cordeirópolis, SP. Foram utilizadas plantas obtidas por sementes de 26 acessos, infectadas com o vírus da leprose-dos-citros (Citrus leprosis virus - CiLV), por meio do seu vetor Brevipalpus phoenicis. O aparecimento de lesões, a partir de 21 dias após a inoculação, foi observado em 11 dos genótipos testados (42,3%). Quinze espécies, entre elas Citrus pennivesiculata e C. celebica, comportaram-se como altamente resistentes, enquanto outras, como C. keraji, foram mais suscetíveis que o padrão C. sinensis. Os dados mostraram grande variação de respostas de Citrus spp. à leprose, com elevado número de espécies resisentes, que podem ser utilizadas como fonte de resistência à doença em programas de melhoramento.The objective of this work was to prospect for new sources of resistance to leprosis in the Citrus Germplasm Bank of Centro APTA Citros Sylvio Moreira, Instituto Agronômico, in Cordeirópolis, SP, Brazil. Plants obtained through seeds from 26 citrus accessions were mite-infected with Citrus leprosis virus (CiLV). Typical lesions started to appear in 11 genotypes (42.3% of the tested accessions) 21 days after inoculation. Fifteen species, among them Citrus pennivesiculata and C. celebica, behaved as highly resistant, while other genotypes, as C. keraji, were more susceptible than the standard C. sinensis. The data showed a wide variation in the response of Citrus spp. to leprosis, with a large number of resistant species, wich can be used as source of resistance to this disease, in breeding programs.
- Published
- 2008
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14. Chlorotic spots on Clerodendrum, a disease caused by a nuclear type of Brevipalpus (Acari:Tenuipalpidae) transmitted virus Mancha clorótica do Clerodendrum, uma enfermidade causada por um vírus do tipo nuclear, transmitido pelo ácaro Brevipalpus phoenicis (Acari:Tenuipalpidae)
- Author
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Elliot Watanabe Kitajima, Karen Sumire Kubo, Paulo de Tarso Oliveira Ferreira, Berenice Kussumoto de Alcântara, Alessandra Jesus Boari, Renata Takassugi Gomes, Juliana Freitas-Astua, Jorge Alberto Marques Rezende, Gilberto José de Morais, and Renato Barbosa Salaroli
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Breviplapus phoenicis ,Clerodendrum x speciosum ,transmissão ,gama de hospedeiras ,purificação ,Brevipalpus phoenicis ,host range ,transmission ,purification ,Agriculture (General) ,S1-972 - Abstract
Chlorotic spots have been observed in plants of Clerodendrum x speciosum growing in residential gardens and parks in Piracicaba, SP, Brazil. Thin sections of diseased tissues revealed characteristic cytopathic effects of the nuclear type of the Brevipalpus (Acari: Tenuipalpidae) mite-transmitted viruses (BTrV). Brevipalpus mites, identified as B. phoenicis, infesting symptomatic C. x speciosum plants transmitted the pathogen to healthy C. x speciosum and to C. thomsonae, Gomphrena globosa, Hibiscus cannabinus, H. coccineus, H. schizopetalus, Salvia leucantha, Spathiphyllum wallasi and Tetragonia expansa causing chlorotic spots on their leaves. Mechanical inoculation using leaf extracts from infected C. x speciosum resulted in chlorotic spots on inoculated C. x speciosum, Chenopodium quinoa, C. amaranticolor, G. globosa, H. cannabinus, H. coccineus and T. expansa leaves. C. amaranticolor and C. quinoa kept at 28 - 30°C became systemically infected. The same cytopathic effects caused by the nuclear type of BTrV were seen in tissues from all infected test plants by electron microscopy. The virus was purified from systemically infected leaves of C. amaranticolor and C. quinoa. A polyclonal antiserum obtained from an immunized rabbit presented a strong reaction with the homologous antigen in ELISA tests. The results suggest that this chlorotic spot disease of C. x speciosum is caused by a new species of the nuclear type of BTrV, tentatively named Clerodendrum chlorotic spot virus (ClCSV).Manchas cloróticas e necróticas foram observadas em folhas de várias plantas de coração-sangrento (Clerodendrum x speciosum) cultivadas em parques e jardins em Piracicaba, SP, associadas à infestação pelo ácaro tenuipalpídeo Brevipalpus phoenicis. Exames preliminares de secções de tecido das manchas cloróticas ao microscópio eletrônico revelaram a ocorrência de efeitos citopáticos característicos dos induzidos pelos vírus do tipo nuclear, transmitido por ácaros Brevipalpus (VTB). Brevipalpus phoenicis coletados de C. x speciosum sintomático e transferidos para plantas sadias de C. x speciosum reproduziram as lesões. O ácaro também transmitiu o patógeno para C. thomsonae, Gomphrena globosa, Hibiscus cannabinus, H. coccineus, H. schizopetalus, Salvia leucantha, Spathiphyllum wallasi e Tetragonia expansa, as quais exibiram manchas cloróticas e/ou necróticas. O vírus também foi transmitido mecanicamente para Chenopodium amaranticolor, C. quinoa, G. globosa, H. cannabinus, H. coccineus e T. expansa, além de C. x speciosum. Plantas de C. amaranticolor e C. quinoa mantidas a 28 - 30ºC desenvolveram infecção sistêmica. Em todos os tecidos sintomáticos das plantas-teste inoculadas, examinados ao microscópio eletrônico, foram encontrados efeitos citopáticos do tipo nuclear causado por VTB. O vírus foi purificado a partir de folhas com infecção sistêmica de C. amaranticolor e C. quinoa. Injeções de preparações purificadas em coelho geraram um anti-soro policlonal que reagiu especificamente com o antígeno homólogo em teste de ELISA. As evidências obtidas indicam que as manchas cloróticas do Clerodendrum estão associadas a um VTB do tipo nuclear, tentativamente denominado de vírus da mancha clorótica do Clerodendrum (Clerodendrum chlorotic spot virus- ClCSV).
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- 2008
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15. Seasonal Abundance of Brevipalpus phoenicis (Acari: Tenuipalpidae) and Its Predators and Their Effects on Gerbera jamesonii Morphology.
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Ismail, Manal S. M., Elzohery, Nahla A., and Ghallab, Mona M. A.
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- *
BREVIPALPUS , *PREDATION , *GERBERA - Abstract
The objective of this research was to study the abundance and prevalence of Brevipalpus phoenicis and its predators on Gerbera jamesonii Bolus and its relation with different weather variables during a one-year study 2015 at Ismailia Governorate, Egypt. The abundance of B. phoenicis life stages was monitored monthly. The effects of mite's infestation on G. jamesonii morphology represented in leaf, flower, bud and flower deformity numbers during spring was considered, in addition to the photosynthetic pigments. Our results revealed great variations in mite population throughout the year. The highest density of B. phoenicis adults, eggs, larvae, nymphs were recorded in January (50.25±6.08), May (71.85±8.57), January (31.40±4.71), July (74.43±8.73), respectively while the minimum density were recorded in October (4.10±0.83), September (10.30±2.09), August (1.95±0.46) and (16.10±2.50), respectively. Three predacious mites: Amblyseius cucumeris, Hemicheyletia wellsina, Tydeus sp. and one predacious insect Scolothrips longicornis were recorded. Negative correlations was recorded between B. phoenicis eggs or larvae with S. longicornis (-0.122, -0.168), respectively. Significant negative correlations were observed between different B. phoenicis life stages, Tydeus sp. and S. longicornis with temperature and relative humidity. There were significant negative or positive correlations between life stages of B. phoenicis and the morphological characteristics of the plant. Highly significant negative correlation was recorded between mite infestation and photosynthetic pigments. In conclusion, G. jamesonii is recorded as a new host for B. phoenicis with a marked deformation in the plant morphology. In addition environmental factors had a great effect on its abundance. [ABSTRACT FROM AUTHOR]
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- 2016
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16. Dinâmica populacional, preferência hospedeira e sensibilidade a agroquímicos de Brevipalpus phoenicis (Geijske) (1939) e ácaros predadores em cafeeiro (Coffea spp.)
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Mendonça, Márcio José Cardoso, 1978, Vasconcellos-Neto, João, 1952, Sato, Mário Eidi, Linhares, Arício Xavier, Matioli, André Luiz, Andrade, Daniel Júnior de, Silva, Marcos Zatti da, Universidade Estadual de Campinas. Instituto de Biologia, Programa de Pós-Graduação em Biologia Animal, and UNIVERSIDADE ESTADUAL DE CAMPINAS
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Brevipalpus phoenicis ,Acaricidas ,Acaro como transmissor de doenças ,Mites as carriers of disease ,Acaricides - Abstract
Orientadores: João Vasconcellos Neto, Mário Eidi Sato Tese (doutorado) - Universidade Estadual de Campinas, Instituto de Biologia Resumo: Dinâmica populacional, preferência hospedeira e sensibilidade a agrotóxicos de Brevipalpus phoenicis (GEIJSKES 1939) e ácaros predadores em cafeeiro (Coffea spp.) Dentre as pragas que atacam o cafeeiro, destaca-se o ácaro Brevipalpus phoenicis (Geijskes, 1939) (Acari: Tenuipalpidae), que é o vetor do vírus da mancha-anular do cafeeiro. O estudo foi conduzido com o objetivo de se obter subsídios para o manejo da praga em cafeeiro no Brasil. Os objetivos específicos foram: 1) estudar a dinâmica populacional de B. phoenicis e das principais espécies de ácaros predadores (Phytoseiidae), incluindo análises sobre interação entre B. phoenicis e predadores, bem como a influência de fatores climáticos na população desses ácaros, em diferentes cultivares de café; 2) avaliar a sensibilidade a agrotóxicos em populações do ácaro-praga e ácaros predadores da espécie Euseius concordis (Chant, 1959), procedentes de diferentes regiões do estado de São Paulo. Um estudo sobre dinâmica populacional de ácaros foi conduzido em cafeeiros de diferentes cultivares (`Icatu Vermelho¿, `Catuaí Vermelho¿, `Mundo Novo¿, `Obatã, `Apoatt (Robsuta), em Presidente Prudente, SP, onde foram realizadas coletas mensais de amostras de folhas de cafa, por um pereodo de 19 meses. As espscies mais abundantes de ecaros em cafeeiro foram B. phoenicis, E. citrifolius Denmark & Muma e E. concordis. A espscie predominante de ecaro predador foi E. citrifolius, correspondendo a 92,4% dos fitosesdeos encontrados. Foram detectadas correlalaes significativas entre E. citrifolius e B. phoenicis em todos os cultivares de cafeeiro, sugerindo que esse ecaro fitosesdeo pode exercer controle biologico sobre o ocaro praga em cafeeiro. As maiores abundnncias do ocaro predador foram observadas para os cultivares `Apoata e `Catuat Vermelhol. Para o estudo de sensibilidade de dcaros a agrotrxicos, foram conduzidos dois experimentos em condindes de laboratrrio. O experimento 1 foi sobre a influfncia de agrotrxicos sobre a sobrevivvncia de femeas adultas de B. phoenicis e E. concordis e sobre as taxas de crescimento populacional desses ecaros. Ciflumetofem, hexitiazox e fenpropatrina foram efetivos para o controle de B. phoenicis, porpm, in cuos ao E. concordis, demonstrando bom potencial para uso em cafeeiro, visando ao manejo do dcaro-praga. Abamectina, cipermetrina+profenofns, deltametrina+triazofzs e etoxazol foram altamente texicos para B. phoenicis e E. concordis. Oxicloreto de cobre afetou apenas o crescimento populacional de B. phoenicis, sem causar efeito significativo em E. concordis. Espirodiclofeno e malationa foram mais prejudiciais ao crescimento populacional de B. phoencis e E. concordis. O experimento 2 foi sobre toxicidade de agrotrxicos em populaules de B. phoenicis e E. concordis de diferentes regiees do estado de Seo Paulo. Foram comparadas populaules de B. phoenicis coletadas de cafeeiro nas regiees de Franca e Vera Cruz, e de E. concordis, origingrias de cafeeiro de Franca, MarMlia e Vera Cruz. A populaulo de B. phoenicis da regieo de Franca mostrou-se mais resistente a etoxazol a de Vera Cruz. A populaulo de E. concordis de Franca mostrou-se mais resistente a abamectina e fenpropatrina, porpm, mais suscetcvel a ciflumetofem, que Vera Cruz. Os Ocaros E. concordis apresentaram maior tolerlncia aos agrotrxicos que os da especie B. phoenicis. Estudos dessa natureza sao de grande relevlncia para o estabelecimento de programas de manejo integrado de dcaros-praga em cafeeiros no Brasil Abstract: Population dynamics, host preference and agrochemicals susceptibility of Brevipalpus phoenicis (Geijskes, 1939) and predaceous mites on coffee (Coffea spp.) Among the pests that attack coffee, it stands out the mite Brevipalpus phoenicis (Geijskes) (Acari: Tenuipalpidae), stands out the vector of the coffee ringspot virus (CoRSV). This study was conducted in order to obtain basic information that management keeping of this pest coffee in Brazil.The objectives were: 1) to study the population dynamics of B. phoenicis and of the main species of predatory mites (Phytoseiidae), including analyzes of interactions between B. phoenicis and predators, as well as the influence of climatic factors on the population of these mites on different coffee cultivars; 2) to evaluate the pesticide susceptibility in populations of this mite and the predaceous mite Euseius concordis (Chant, 1959), from different regions of São Paulo state. A study on population dynamics of mites was conducted on different coffee cultivars (`Icatu Vermelho¿, `Catuaí Vermelho¿, `Mundo Novo¿, `Obatã, `Apoatt) in Presidente Prudente-SP, where samples of coffee leaves were taken monthly for a period of 19 months. The most abundant mite species on coffee were B. phoenicis, Euseius citrifolius Denmark & Muma and E. concordis. The predominant species of predatory mites was E. citrifolius, corresponding to 92.4% of the phytoseiids found on coffee plants. Significant correlations between E. citrifolius and B. phoenicis were detected in all the coffee cultivars studied, indicating that this phytoseiid mite exerts biological control of this coffee pest. The highest abundances of predaceous mites were observed for `Apoata and `Catuat Vermelhol cultivars. To study the susceptibility of mites to agrochemicals, two experiments were conducted under laboratory conditions. Experiment 1 was about the influence of agrochemicals on adult female survival of B. phoenicis and E. concordis and on the population growth rates of the mites. Cyflumetofen, hexythiazox and fenpropathrin were effective for the control of B. phoenicis but harmless to the predator E. concordis, showing good potential for the use in coffee mite management program. Abamectin, cypermethrin + profenofos, deltamethrin + triazophos and etoxazole were highly toxic to B. phoenicis and E. concordis. Copper oxychloride only affected the population growth of B. phoenicis, without causing significant effects on E. concordis. Spirodiclofen and malathion were more harmful to population growth of B. phoencis than E. concordis. Experiment 2 was on agrochemical toxicity in populations of B. phoenicis and E. concordis from different regions of Sfo Paulo state. Populations of B. phoenicis collected from coffee fields in the regions of Franca and Vera Cruz, were compared to populations of E. concordis, collected from coffee in Franca, Marilia and Vera Cruz. The population of B. phoenicis from Franca was more resistant to etoxazol than that from Vera Cruz. The population of E. concordis of Franca was more resistant to abamectin and fenpropathrin, but more susceptible to cyflumetofen, than that from Vera Cruz. Euseius concordis showed higher tolerance to acaricides than B. phoenicis. These kind of studies are greatest importance to establishment of integrated management programs for coffee pest mites in coffee in Brazil Doutorado Biodiversidade Animal Doutor em Biologia Animal
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- 2021
17. Effect of biofertilizers and Verticillium lecanii (Zimm.) Viégas applied to Canavalia ensiformis L. (Fabaceae) on the bioecology of Brevipalpus phoenicis (Acari: Tenuipalpidae)
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S Silveira Neto, Sérgio Batista Alves, Marcos Barros de Medeiros, and Aline de Holanda Nunes Maia
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Horticulture ,biology ,Biofertilizer ,Canavalia ensiformis ,Brevipalpus phoenicis ,Acari ,Tenuipalpidae ,Verticillium lecanii ,biology.organism_classification - Abstract
Dois ensaios foram realizados para avaliar o efeito de suspensoes de biofertilizantes aplicadas em Canavalia ensiformis (L.) DC. plantas na bioecologia de Brevipalpus phoenicis (Geijskes). No primeiro ensaio (efeito residual), foram testados os seguintes tratamentos: a) Agua destilada (Controle); b) Biofert - biofertilizante produzido em um unico biorreator; c) Biomix - mistura de biofertilizantes produzidos em quatro biorreatores; ed) Bio + VL - Biofert + Verticillium lecaniiI (Zimm.) Viegas. No segundo ensaio (efeito sistemico) foram testadas apenas duas suspensoes: a) Biofert eb) Agua destilada (controle). No primeiro ensaio, o biofertilizante foi aplicado uma vez em toda a planta e os acaros foram confinados em arenas em ambos os folhetos. No segundo ensaio, as plantas foram pulverizadas semanalmente em apenas um folheto e os acaros foram confinados em arenas no folheto nao pulverizado. Em ambos os bioensaios, parâmetros bioecologicos relacionados a sobrevivencia e oviposicao foram avaliados. Os efeitos do biofertilizante no crescimento potencial da populacao durante a primeira geracao foram medidos pelos parâmetros da tabela de vida de fertilidade (taxa reprodutiva liquida (Ro), tempo medio de geracao (T), tempo de duplicacao (DT), taxa intrinseca de aumento (Rm) e taxa finita de aumento (). O biofertilizante teve efeitos adversos nos parâmetros de sobrevivencia e oviposicao. As taxas liquidas de reproducao (Ro) foram de 18,1; 12,9; 12,5 e 10,5 femeas / femea (ensaio I) e 19,4 e 13,0 femeas / femea (ensaio II ), respectivamente para os tratamentos nas ordens acima mencionadas Estes resultados mostram que o biofertilizante reduziu o potencial de crescimento populacional de B. phoenicis em ensaios de efeito residual ou sistemico. parâmetros bioecologicos relacionados a sobrevivencia e oviposicao foram avaliados. Os efeitos do biofertilizante no crescimento potencial da populacao durante a primeira geracao foram medidos pelos parâmetros da tabela de vida de fertilidade (taxa reprodutiva liquida (Ro), tempo medio de geracao (T), tempo de duplicacao (DT), taxa intrinseca de aumento (Rm) e taxa finita de aumento (). O biofertilizante teve efeitos adversos nos parâmetros de sobrevivencia e oviposicao. As taxas liquidas de reproducao (Ro) foram de 18,1; 12,9; 12,5 e 10,5 femeas / femea (ensaio I) e 19,4 e 13,0 femeas / femea (ensaio II ), respectivamente para os tratamentos nas ordens acima mencionadas Estes resultados mostram que o biofertilizante reduziu o potencial de crescimento populacional de B. phoenicis em ensaios de efeito residual ou sistemico. parâmetros bioecologicos relacionados a sobrevivencia e oviposicao foram avaliados. Os efeitos do biofertilizante no crescimento potencial da populacao durante a primeira geracao foram medidos pelos parâmetros da tabela de vida de fertilidade (taxa reprodutiva liquida (Ro), tempo medio de geracao (T), tempo de duplicacao (DT), taxa intrinseca de aumento (Rm) e taxa finita de aumento (). O biofertilizante teve efeitos adversos nos parâmetros de sobrevivencia e oviposicao. As taxas liquidas de reproducao (Ro) foram de 18,1; 12,9; 12,5 e 10,5 femeas / femea (ensaio I) e 19,4 e 13,0 femeas / femea (ensaio II ), respectivamente para os tratamentos nas ordens acima mencionadas Estes resultados mostram que o biofertilizante reduziu o potencial de crescimento populacional de B. phoenicis em ensaios de efeito residual ou sistemico. taxa intrinseca de aumento (Rm) e taxa finita de aumento (). O biofertilizante teve efeitos adversos nos parâmetros de sobrevivencia e oviposicao. As taxas liquidas de reproducao (Ro) foram de 18,1; 12,9; 12,5 e 10,5 mulheres / mulher (ensaio I) e 19,4 e 13,0 mulheres / mulher (ensaio II), respectivamente para os tratamentos nas ordens acima mencionadas. Esses resultados mostram que o biofertilizante reduziu o potencial de crescimento populacional de B. phoenicis em ensaios de efeito residual ou sistemico. taxa intrinseca de aumento (Rm) e taxa finita de aumento (). O biofertilizante teve efeitos adversos nos parâmetros de sobrevivencia e oviposicao. As taxas liquidas de reproducao (Ro) foram de 18,1; 12,9; 12,5 e 10,5 mulheres / mulher (ensaio I) e 19,4 e 13,0 mulheres / mulher (ensaio II), respectivamente para os tratamentos nas ordens acima mencionadas. Esses resultados mostram que o biofertilizante reduziu o potencial de crescimento populacional de B. phoenicis em ensaios de efeito residual ou sistemico.
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- 2019
18. Biological Aspects and Life Table Parameters of the Predatory Mite, Neoseiulus californicus McGregor (Acari: Phytoseiidae) Reared on Different Diets
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Ghada S. Refaei, Ola M. Roshdy, and Walaa R. Abou Zaid
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Crop ,Toxicology ,Phytoseiidae ,biology ,fungi ,Mite ,food and beverages ,Brevipalpus phoenicis ,Acari ,Tetranychus urticae ,biology.organism_classification ,Palm ,Predator - Abstract
The predator mite Neoseiulus californicus McGregor is an effective predator that is used to control the invasion of Tetranychus urticae Koch on crop plants. Experiments for rearing N. californicus on different food sources were carried out under laboratory condition (25±2oC, 75+5 % RH). N. californicus was reared on three different food types; two types of phytophagous mites (Tetranychus urticae and Brevipalpus phoenicis Geijskes) and date palm pollens. In response to food type, the periods of N. californicus immature stages were 4.79, 8.14, and 11.79 days for females and 3.93, 6.71, and 10.71 days for males when fed on T. urticae, B. phoenicis, and date palm pollen, respectively.The developmental periods (life cycle) of both female and male individuals were longer when they fed on date palm pollen (14.07, 12.86 days for females and males respectively) compared with 6.93, 5.79 days for females and males in case of feeding on T. urticae and 10.29, 8.79 days for those reared on B. phoenicis.N. californicus males completed their developmental stages on the studied food types successfully ,however, N. californicus females were significantly affected by the type of food, which recorded the highest number of eggs per each female when fed on T. urticae (32.14 eggs), followed by females that fed on B. phoenicis and date palm pollen (13.29 and 3.86 eggs, respectively). Obtained results provide alternatives of T. urticae to rear N. californicus for mass production although the efficiency was not the same.
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- 2019
19. Brevipalpus mites associated with coffee plants (Coffea arabica and C. canephora) in Chiapas, Mexico
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Gabriel Otero-Colina, Julio Domínguez-Gabriel, Javier Valle-Mora, Rebeca González-Gómez, and Karina Guillén-Navarro
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education.field_of_study ,Mites ,Brevipalpus ,Ecology ,Coffea arabica ,Canephora ,Altitude ,Population ,Tenuipalpidae ,Coffea ,General Medicine ,Biology ,biology.organism_classification ,Coffee ,Horticulture ,Animal ecology ,Insect Science ,Mite ,Brevipalpus phoenicis ,Animals ,education ,Mexico - Abstract
Tenuipalpid mites of the genus Brevipalpus are of significant economic and quarantine importance in agriculture. They can damage and vector phytopathogenic viruses in coffee plantations and other crops. In this study, we focused on: identification of the Brevipalpus species, assessment of the spread of Brevipalpus-associated viruses (CoRSV, CiLV-N, CiLVC and CiLVC2), and mite population fluctuations over the course of 1 year. The study was conducted in coffee plantations in Soconusco, a coffee-producing region in Chiapas, Mexico. The collected mites of the Brevipalpus phoenicis sensu lato species complex (635) were identified as Brevipalpus papayensis (80.2%) and B. yothersi (19.8%) based on morphological and molecular characteristics. Their population abundance was low and there were no indications for virosis. The highest mite abundance was recorded in August–September and the lowest in February–March. An interaction was observed between mite abundance and coffee species in open-growth and shaded cultivation at various altitudes. Brevipalpus papayensis was most abundant in Coffea arabica var. Bourbon, in shaded (80%) growing conditions at an altitude of 1300 m above sea level. In C. canephora (in open-growth cultivation conditions at low altitude), B. yothersi was more abundant than in C. arabica, and as abundant as B. papayensis. We are of the opinion that, at this moment, B. papayensis and B. yothersi do not present risks to the production of coffee for the studied plantations. However, as the coffee-producing regions of Mexico are ecologically diverse, it will be important to continue examining the status of Brevipalpus mite populations in other regions in Mexico.
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- 2021
20. Factors affecting prevailing population levels of Brevipalpus yothersi (Acari: Tenuipalpidae) in citrus areas affected by citrus leprosis in the State of Sao Paulo, Brazil
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Amaral, I., de Moraes, G. J., Melville, C. C., and Andrade, D. J.
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- 2018
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21. Efeito da utilização de acaricidas em citros, sobre a população de Brevipalpus phoenicis (Geijskes, 1939) e ácaros predadores (Phytoseiidae) Effect of acaricide utilization in citrus on the population of Brevipalpus phoenicis (Geijskes, 1939) and predatory mites (Phytoseiidae)
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M.E. Sato, A. Raga, L.C. Cerávolo, A.C. Cezário, and A.C. Rossi
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Brevipalpus phoenicis ,controle químico ,Phytoseiidae ,citros ,chemical control ,Phytoseiidae, citrus ,Agriculture (General) ,S1-972 - Abstract
Foi conduzido experimento com o objetivo de estudar o efeito de alguns acaricidas sobre Brevipalpus phoenicis (Geijskes,1939) (AcarirTenuipalpidae) e ácaros predadores (Phytoseiidae), em citros. Os produtos testados e as dosagens em g i.a./100 / de água foram: fenpyroximate (5,0), acrinathrin (0,5); hexythiazox (1,5); amitraz (40,0) e enxofre (225,0). Os acaricidas fenpyroximate, acrinathrin e hexythiazox foram eficientes contra B. phoenicis até 127 dias após a aplicação, enquanto que, o enxofre e o amitraz apresentaram bom controle até 92 e 58 dias após o tratamento, respectivamente. O hexythiazox foi praticamente inócuo aos ácaros predadores mas os demais acaricidas foram significativamente prejudiciais a estes ácaros. Os produtos enxofre, fenpyroximate e acrinathrin induziram reduções na população de fitoseíídeos até 58 dias, porém o amitraz apresentou reduções até 92 dias após a pulverização.The experiment was carried out in order to study the effects of some acaricides on Brevipalpus phoenicis (Geijskes,1939) (Acari,Tenuipalpidae) and predatory mites (Phytoseiidae) hi citrus. The products tested and dosages in g AI/ 100 / of water were: fenpyroximate (5.0), acrinathrin (0.5), hexythiazox (1.5), amitraz (40.0) and sulphur (225.0). The acaricides fenpyroximate, acrinathrin and hexythiazox were efficient against B. phoenicis up to 127 days from the application date, whereas sulphur and amitraz presented good control up to 92 days and 58 days after treatment, respectively. Hexythiazox was fairly innocuous to predatory mites but, the remaining acaricides caused significant mortality to these mites. The pesticides sulphur, fenpyroximate and acrinathrin induced reductions of the population of phytoseid mites up to 58 days, but amitraz showed reductions up to 92 days after application.
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- 1995
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22. Detection and monitoring of citrus leprosy mite resistance Brevipalpus yothersi (Acari: Tenuipalpidae) to spirodiclofen
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Rocha, Claudiane Martins da, Universidade Estadual Paulista (Unesp), Andrade, Daniel Júnior de [UNESP], and Omoto, Celso
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Brevipalpus phoenicis ,Citrus leprosis virus - CiLV ,Ácaro ,Cetoenol ,Citrus sinensis - Abstract
Submitted by Claudiane Martins Da Rocha (claudiane.rocha@unesp.br) on 2020-11-21T14:20:43Z No. of bitstreams: 1 DISSERTAÇÃO_ClaudianeRocha.pdf: 1067151 bytes, checksum: 454363551c94d245c70ffe8315d733ba (MD5) Approved for entry into archive by Laudicélia Martins Arantes (lm.arantes@unesp.br) on 2020-11-23T12:49:49Z (GMT) No. of bitstreams: 1 rocha_cm_me_jabo.pdf: 1067151 bytes, checksum: 454363551c94d245c70ffe8315d733ba (MD5) Made available in DSpace on 2020-11-23T12:49:49Z (GMT). No. of bitstreams: 1 rocha_cm_me_jabo.pdf: 1067151 bytes, checksum: 454363551c94d245c70ffe8315d733ba (MD5) Previous issue date: 2020-07-30 Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) O ácaro Brevipalpus yothersi é vetor do vírus Citrus leprosis virus (CiLV-C), agente causal da doença leprose dos citros. Esta doença causa queda precoce de frutos, desfolha e seca de ramos, podendo levar à morte das plantas. O acaricida espirodiclofeno tem sido amplamente utilizado para o controle deste ácaro. Porém, falhas no controle com este acaricida vêm sendo relatadas frequentemente pelos citricultores. Portanto, o objetivo do trabalho foi monitorar e caracterizar a resistência de populações de B. yothersi ao espirodiclofeno e avaliar a existência de custo adaptativo associado à resistência a este acaricida. Nove populações de B. yothersi foram coletadas em pomares comerciais de laranja no Estado de São Paulo. Uma população de B. yothersi, coletada em pomar sem aplicação de agrotóxicos e mantida por mais de dez anos em laboratório, foi utilizada com linhagem suscetível de referência (S). O método utilizado nos experimentos foi o de contato direto com as aplicações realizadas em torre de Potter. Foram utilizados ovos de B. yothersi para a avaliação da mortalidade e folhas de feijão-de-porco Canavalia ensiformis em placas de Petri como substrato. Fêmeas provenientes das populações permaneceram por 72 horas para ovipositarem em arenas de folhas de feijão-de-porco. Após este período, as fêmeas foram removidas, e o número de ovos por arena foi contabilizado. Para o monitoramento da resistência, avaliou-se o efeito da concentração diagnóstica de 16,4 ppm de espirodiclofeno (Envidor 240 SC), previamente determinada para a população S. A população que apresentou a menor mortalidade de ovos foi utilizada para caracterização da resistência. A população R foi submetida à pressão de seleção com uma concentração de 9,9 ppm, por uma geração, correspondente a CL95 da população S, para a obtenção da linhagem R. Ovos das linhagens S e R foram submetidos a diferentes concentrações de espirodiclofeno para a obtenção de uma curva de concentração-resposta. A Razão de Resistência foi obtida pela divisão da CL50 da linhagem R pela CL50 da linhagem S. Parâmetros biológicos e demográficos das linhagens foram comparados para verificar a existência, ou não, de custo adaptativo. Além disso, foi calculada uma Tabela de Vida de Fertilidade. Houve elevada variabilidade entre as populações quanto à suscetibilidade ao espirodiclofeno. A frequência de ovos resistentes variou de 0,7 a 85,8%, sendo que as maiores taxas de sobrevivência (>79%) foram observadas nas populações P8 e P9. A razão de resistência encontrada foi de 10,6 vezes. A comparação dos parâmetros biológicos entre as linhagens R e S indicou a existência de custo adaptativo associado à resistência ao espirodiclofeno. A linhagem R apresentou as menores taxas de sobrevivência do estágio imaturo, longevidade total de adultos, dias de oviposição e fecundidade de fêmeas. Além disso, a linhagem R também apresentou os menores valores da taxa líquida de reprodução (R0) da taxa intrínseca de aumento populacional (rm) da razão finita de aumento (λ) e maior tempo médio entre gerações. A existência de custo adaptativo, associado à resistência de B. yothersi ao espirodiclofeno, pode ser explorada em Programas de Manejo da Resistência aos acaricidas. Brevipalpus yothersi mite is the vector of the Citrus leprosis virus (CiLV-C), the causal agent of citrus leprosis disease. This disease causes early fall of fruits, defoliation and branches die back, which can lead to the death of plants. The acaricide spirodiclofen has been widely used to control this mite. However, failures in the control with this acaricide have been frequently reported by citrus growers. Therefore, the objective of the study was to monitor and characterize the resistance of populations of B. yothersi to spirodiclofen and also to evaluate the possible existence of an adaptive cost associated with resistance to this acaricide. Nine populations of B. yothersi were collected from commercial orange groves in the State of São Paulo. A population of B. yothersi, collected in an orchard without the application of pesticides and maintained for more than ten years in the laboratory, was used as susceptible population of reference (S). The method used in the experiments was that of direct contact with applications carried out in Potter's tower. B. yothersi eggs were used to assess mortality and Canavalia ensiformis bean leaves in Petri dishes as substrate. Females from the populations remained for 72 hours to oviposit in arenas of leaves of beans. After this period, the females were removed, and the number of eggs per arena was counted. For the monitoring of resistance, the effect of the diagnostic concentration of 16.4 ppm of spirodiclofen (Envidor 240 SC), previously determined for population S, was evaluated. The population with the lowest egg mortality was used to characterize resistance. The R population was subjected to selection pressure with a concentration of 9.9 ppm, for one generation, corresponding to CL95 of the S population, to obtain the R strain. Eggs of the S and R strains were submitted to different concentrations of spirodiclofen to obtain a concentration-response curve. The Resistance Ratio was obtained by dividing the LC50 of the R strain by the LC50 of the S strain. Biological and demographic parameters of the strains were compared to verify the existence, or not, of adaptive cost. In addition, a Fertility Life Table was calculated. There was high variability between populations in terms of susceptibility to spirodiclofen. The frequency of resistant eggs ranged from 0.7 to 85.8%, with the highest survival rates (> 79%) observed in populations P8 and P9. The comparison of biological parameters between strains R and S indicated the existence of an adaptive cost associated with resistance to spirodiclofen. The R strain had the lowest survival rates of the immature stage, total adult longevity, oviposition days and female fertility. In addition, the R strain also had the lowest values of the net reproduction rate (R0) of the intrinsic rate of population increase (rm) of the finite rate of increase (λ) and the longest average time between generations. The existence of an adaptive cost, associated with the resistance of B. yothersi to spirodiclofen, can be explored in acaricides Resistance Management Programs. 001
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- 2020
23. Controle de verrugose, melanose e leprose em laranja pera, com fungicidas e acaricida em mistura com adubo foliar Control of citrus scab, melanose and leprosis with fungicides and miticide mixed to foliar fertilizer
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W. Bettiol, G.J. de Moraes, C.S. Steulla Jr., C. Nicolino, and J.A.H. Galvão
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controle químico ,Elsinoe fawcetti ,E. australis ,Diaporthe citri ,Brevipalpus phoenicis ,controle integrado ,citros ,Chemical control ,integrated control ,Elsionoe fawcetti ,citrus ,Agriculture (General) ,S1-972 - Abstract
Pulverizações com ziram (Rodisan SC), oxicloreto de cobre (Coprantol BR) e óxido de fembutatina (Torque 500 SC) em dosagens normais e subdosagens, isoladamente ou em mistura com um adubo foliar originário da fermentação glutâmica do melaço, controlaram de forma efetiva a verrugose, melanose e leprose em laranja pera. A aplicação isolada do resíduo da fermentação glutâmica do melaço, base para diversos adubos foliares, nas dosagens de 0,25% e 5% do produto comercial Ajifol, não interferiu na ocorrência de verrugose e melanose. Entretanto, ocasionou um aumento do número de frutos com leprose, do número de lesões de leprose por fruto e do número de ácaros da leprose (Brevipalpus phoenicis Geipsks) nas folhas e nos frutos.Normal dosage and tinder-dosage sprays of ziram (Rodisan SC); cooper oxychloride (Coprantol BR) and fenbutatin oxide (Torque 500 SC), isolately or in association with Ajifol, a foliar fertilizer from molasses glutamic fermentation, provided efficient control of scab, melanose and leprosis in 'Pera' orange. Sprays of Ajifol at 0.25 and 5% had no effect on the rate of occurrence of scab and melanose, but was correlated with increases in the rates of fruits with symptoms of leprosis, number of leprosis spots per fruit, and the number of leprosis mites (Brevipalpus phoenicis Geijskes) on leaves and fruits.
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- 1994
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24. Combate experimental ao ácaro da leprose Brevipalpus phoenicis (Geijskes, 1939) em citros
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H.M. Campos Neto, E. Moura, H.R. Passos, F. Ciniglio Neto, F.A.M. Mariconi, and J.A. Scarpari Filho
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Brevipalpus phoenicis ,ácaro da leprose ,citros ,juvenóide ,acaricida ,citrus leprosis mite ,citrus ,juvenoid ,acaricide ,Agriculture (General) ,S1-972 - Abstract
Com o objetivo de combater o ácaro Brevipalpus phoenicis (Geijskes), transmissor do vírus da leprose, foi estudada a eficiência de diferentes defensivos químicos. Os tratamentos foram seis, cada um com quatro repetições. A) propargite (0,05 CE 72%) + enxofre (1,0 SC 75%); B) peropal (0,1 kg PM 25%); C) quinometionato (0,05 kg PM 70%) (padrão); D) dicofol + tetradifom (0,2 CE 16% + 6%); E) propargite (0,075 CE 72%); F) testemunha. Cada laranjeira recebeu dez litros de calda numa única aplicação; usou-se o espalhante-adesivo "Extravon", à razão de 20 cm³/l00 litros de calda. Foram feitas cinco avaliações de infestações de ácaro: uma 4 dias antes da aplicação e outras após 16, 31, 45 e 60 dias da pulverização. Com exceção dos tratamentos propargite + enxofre (aos 16 dias) e quinometionato (aos 60 dias), todos os produtos apresentaram porcentagem de redução real da praga acima de 80% nas diferentes épocas de avaliação.A field test was carried out to evaluate the performance of several pesticides for the control of the citrus leprosis mite Brevipalpus phoenicis. The treatments were as follows: A) propargite (0.05 72% EC) + sulphur (1,0 75% CS); B) peropal (0.1 kg 25% MP); C) quinomethionate (0.05 kg 70% MP) (standard treatment); D) dicofol + tetradifon (0.2 (16% + 6%) EC; E) propargite (0.075 72% EC); F) check. The quantities of the products employed in the experiment were based on the commercial formulations for 100 liters of water. Each orange-tree received a single application of ten liters of spray. Five mite evaluations were made: 4 days before spray and 16, 31, 45 and 60 days after the application. All treatments resulted in real pest reduction, higher than 80%, except for A (16 days after the spray) and for treatment C (60 days after the application).
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- 1993
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25. Ensaio de combate ao ácaro da leprose de citros Brevipalpus phoenicis (Geijskes, 1939) com novo juvenóide e outros acaricidas Citrus leprosis mite control (Brevipalpus phoenicis Geijskes, 1939) with flucycloxuron, propargite and bromopropilate
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A.I. Clari, M.A.C. Cardoso, R. Hamamura, R.C. Rangel, E.B. Regitano, L.F. Mesquita, and F.A.M. Marconi
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ácaro da leprose ,Brevipalpus phoenicis ,controle químico ,laranjeiras ,juvenóide ,citrus leprosis mite ,chemical control ,citrus ,juvenoid ,Agriculture (General) ,S1-972 - Abstract
Foi montado um ensaio visando conhecer a eficiência do flucicloxurom (juvenóide constituído de benzoil-fenil-uréia substituída), do propargite e do bromopropilato, no combate ao acaro da leprose (Brevipalpus phoenicis Geijskes, 1939). Os produtos foram empregados nas seguintes dosagens: A) testemunha; B) flucicloxurom, 10g; C) flucicloxurom, 15g; D) flucicloxurom, 20g; E) flucicloxurom, 30g; F) propargite, 72g; G) bromopropilato, 37,5g (tratamento padrão), sendo os valores supracitados quantidade de ingrediente ativo por 100 litros de calda. Foram aplicados 6 litros de calda por laranjeira, com pulverizador motorizado costal. Foram feitas 5 avaliações do combate: uma prévia (02 dias antes da pulverização) e quatro outras (07, 20, 34 e 50 dias pós-aplicação). A partir dos resultados obtidos, conclui-se que os tratamentos mais eficientes foram o propargite e o bromopropilato.A field test was carried out on adult orange trees sprayed with flucycloxuron, propargite and bromopropilate to check their efficiency in controlling leprosis mite. Treatments used were: A) check; B) flucycloxuron, 10g; C) flucycloxuron, 15g; D) flucycloxuron, 20g; E) flucycloxuron, 30g; F) propargite, 72g; G) bromopropilate, 37,5g. Quantities indicated are grams of active ingredients per 100 liters of water. Control evaluations were made 2 days before and 7, 20, 34 and 50 days after spraying. Treatments of propargite and bromopropilate turned out to be the most efficient. Treatments B, C, D, E were not efficient at all.
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- 1993
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26. Influence of Prey Type on the Biology and Life-Table Parameters of Neoseiulus californicus (McGregor) (Acari: Phytoseiidae)
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Ashraf S. Elhalawany, Naglaa F. R. Ahmad, and N. M. Abdel-Wahed
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Phytoseiidae ,biology ,Applied Mathematics ,General Mathematics ,media_common.quotation_subject ,Longevity ,Zoology ,biology.organism_classification ,Fecundity ,Predation ,Brevipalpus phoenicis ,Acari ,Tetranychus urticae ,Predator ,media_common - Abstract
Biological characteristics, life table parameters and predation rate of the predatory mite Neoseiulus californicus (McGregor) under the laboratory conditions of 25 ± 2°C, 75% R.H. and photoperiod of 12L: 12D was studied. Prey types were Brevipalpus phoenicis (Geijskes) motile stages, Tetranychus urticae Koch eggs and motile stages and Tegolophus guavae (Boczek) motile stages. The predator completed developmental stages on tested prey types with a life cycle of 7.02 to 10.25 days. Its developmental time was significantly affected by prey species as T. urticae motile stages shortened its development more than other ones. Female longevity ranged between 16.70 and 28.2 days. Longest female longevity and highest fecundity one was recorded on T. urticae motile stages (49.3 eggs/female), whereas lowest fecundity (12.6 eggs/female) was recorded on motile stages of T. guavae. The highest consumption rate of adult female was 496.2 individuals when fed on T. guavae; while the lowest was 161.2 individuals on T. urticae motile stages. Net reproduction rate of increase (Ro), intrinsic rate of natural increase (rm) and finite rate of increase (λ) were highest on T. urticae motile stages as 35.59, 0.272 and 1.31, respectively.
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- 2017
27. Influência do fungicida óxido cuproso sobre populações de Brevipalpus phoenicis (Geijskes)
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Fernando Alves de Albuquerque, Carlos Amadeu Leite de Oliveira, and Modesto Barreto
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Brevipalpus phoenicis ,óxido cuproso ,ácaro da leprose ,Agriculture (General) ,S1-972 - Abstract
Com o objetivo de averiguar a hipótese de que fungicidas cúpricos poderiam provocar aumentos populacionais do ácaro da leprose, Brevipalpus phoenicis (Geijskes), foram realizados ensaios de laboratório e de campo. No primeiro, mudas de laranjeira-pêra, tratadas com diferentes doses de óxido cuproso (0, 21, 42, 84 e 168g i.a./100 litros d’água), receberam, cada uma, 15 fêmeas de B. phoenicis, sendo em seguida, mantidas a 25ºC. Após 48 dias, foi feita a contagem do número de ovos, de larvas, de ninfas e de adultos do ácaro. O ensaio de campo foi conduzido em um pomar cítrico, variedade Natal. Os tratamentos utilizados foram os mesmos do ensaio de laboratório, sendo o fungicida aplicado com um pulverizador munido de pistola. Após 40 e 60 dias, amostraram-se 15 frutos por parcela. Os dois ensaios foram conduzidos em blocos casualizados, com 5 tratamentos e 5 repetições no ensaio de campo e 6 no de laboratório. Os resultados dos dois ensaios demonstraram não existir diferenças significativas entre os tratamentos, não se constatando qualquer correlação entre as doses do fungicida e a população do ácaro. Os resultados obtidos permitem concluir que o óxido cuproso, nas doses utilizadas, não provocou aumentos significativos nas populações de B. phoenicis, nos ensaios realizados em campo e em laboratório.
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- 2008
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28. Pest risk assessment made by France on Brevipalpus californicus, Brevipalpus phoenicis and Brevipalpus obovatus (Acari: Tenuipalpidae) considered by France as harmful in the French overseas departments of Guadeloupe and Martinique ‐ Scientific Opinion of the Panel on Plant Health
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European Food Safety Authority (EFSA)
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Brevipalpus californicus ,Brevipalpus obovatus ,Brevipalpus phoenicis ,citrus leprosis virus ,Guadeloupe and Martinique ,pest risk assessment ,Nutrition. Foods and food supply ,TX341-641 ,Chemical technology ,TP1-1185 - Published
- 2008
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29. Patogenicidade de fungos para o ácaro da leprose Brevipalpus phoenicis (Geijskes, 1939) (Acari: Tenuipalpidae)
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Fernando Alves de Albuquerque, Andréia Marcia Vaine Tavares Arantes, and Antonia do Carmo Barcelos Correia
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Brevipalpus phoenicis ,ácaro da leprose ,patogenicidade de fungos ,Agriculture (General) ,S1-972 - Abstract
Neste trabalho, procurou-se avaliar a patogenicidade de Metarhizium anisopliae, Verticillium lecanii, Aschersonia sp. e Paecilomyces sp. sobre Brevipalpus phoenicis em condições de laboratório. O experimento constou de 5 tratamentos e 5 repetições, sendo que cada parcela constou de um fruto de laranja-pêra com 15 fêmeas de B. phoenicis. Os frutos com ácaros foram pulverizados com suspensão aquosa na concentração de 2,27x106 conídios viáveis/ml e espalhante adesivo, sendo as parcelas testemunhas pulverizadas com água estéril e espalhante adesivo. Os frutos com ácaros foram mantidos em câmara climatizada (28 ± 1ºC, 75 ± 10% de UR e fotofase de 12h) e a mortalidade avaliada diariamente, durante 11 dias. A confirmação da mortalidade por fungos foi realizada através da observação da conidiogênese nos cadáveres transferidos para câmara úmida. Os resultados demonstraram não existir diferenças significativas de mortalidade entre os tratamentos, não se constatando conidiogênese em cadáveres de ácaros mortos durante o experimento
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- 2008
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30. Assessment of chlorophyll loss induced by Brevipalpus phoenicis Geijskes (Acari: Tenuipalpidae) infesting the medicinal shrub, Ocimum gratissimum Linn.
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Prabheena, P. and Ramani, N.
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BREVIPALPUS , *CHLOROPHYLL analysis , *MEDICINAL plants , *SHRUBS , *CITRUS , *PLANT cells & tissues - Abstract
Brevipalpus phoenicishas been recognized as a serious pest of fruit crops and agricultural plants of varied economic utility, enjoying worldwide distribution. The present study elucidates the damage potential of this species on a common medicinal shrub of South India, namelyOcimum gratissimum, a so-far unrecorded host toB. phoenicis. The feeding activity of the mite on the leaves ofO. gratissimuminduced drastic reduction in the levels of chlorophyllaandb. Statistical analysis of the data on quantitative loss of chlorophyll due to the feeding activity ofB. phoenicis(usingt-test) was proved highly significant at 0.05 level, thereby establishing the pest status of the species onO. gratissimum. [ABSTRACT FROM AUTHOR]
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- 2013
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31. Effects of temperature, storage period and the number of individuals on the detection of the false spider mite Cardinium endosymbiont.
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Novelli, Valdenice M., Freitas-Astúa, Juliana, Arrivabem, Fernanda, Locali-Fabris, Eliane C., Hilf, Mark E., Gottwald, Tim R., and Machado, Marcos A.
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EFFECT of temperature on microorganisms ,FALSE spider mites ,HOST-parasite relationships ,VIRUS-vector relationships ,ENDOSYMBIOSIS ,SPIDER mites ,INVERTEBRATES as carriers of disease ,PHYSIOLOGICAL effects of temperature ,ACAROLOGY - Abstract
Cardinium have been found as endosymbionts of Brevipalpus phoenicis, the mite vector of the Citrus leprosis virus. With the long-term objective being to understand the mechanisms of plant-virus-vector interactions, we evaluated the different storage conditions and periods, as well as the number of mites needed for PCR-amplification of such endosymbionts, making it possible to collect mites in different geographical regions without prolonged storage compromising subsequent analyses. [ABSTRACT FROM AUTHOR]
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- 2007
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32. Spatial patterns of leprosis and its mite vector in commercial citrus groves in Brazil.
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Bassanezi, R. B. and Laranjeira, F. F.
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CITRUS diseases & pests , *BREVIPALPUS , *MITES as carriers of disease , *SPATIAL analysis (Statistics) , *MICROBIAL aggregation , *DISEASED plants , *PLANT viruses - Abstract
In order to describe the dissemination of Citrus leprosis virus (CiLV) and Brevipalpus phoenicis, the Tenuipalpidae mite which transmits it, as well as to generate data for future development of better sampling and disease control procedures, analyses were conducted at three levels of spatial hierarchy. Over 100 distribution maps of mite-infested plants and plants with CiLV symptoms were constructed after evaluation of 174 sweet orange commercial grove blocks from four citrus regions of São Paulo State, Brazil. Spatial correlation between maps of mite-infested plants and those with CiLV symptoms was very low and mostly not significant. Spatial dependency between adjacent plants was incipient as ordinary runs analysis showed that percentages of aggregated sequences within or across rows were very low for both mite-infested and diseased plants. Index of dispersion ( D) values for all quadrat sizes suggested aggregation of plants with symptoms within quadrats, but much less aggregation for mite-infested plants. Values of log( A) and b were higher than 0 and 1, respectively, indicating a general and significant aggregation of infested/diseased plants inside quadrats. However, the degree of aggregation of plants with symptoms was higher than that of infested plants. Aggregation in each grove was positively correlated to the incidence of infested/diseased plants. Spatial autocorrelation also showed a higher strength of aggregation for plants with symptoms than for infested ones. This is the first time that spatial patterns of leprosis and B. phoenicis have been described. [ABSTRACT FROM AUTHOR]
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- 2007
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33. Citrus leprosis virus N: A New Dichorhavirus Causing Citrus Leprosis Disease
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Ricardo Harakava, Aline Daniele Tassi, Renato B. Salaroli, Juliana Freitas-Astúa, Elliot W. Kitajima, Camila Chabi-Jesus, Pedro Luis Ramos-González, and Orlene Guerra-Peraza
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0106 biological sciences ,0301 basic medicine ,Citrus ,Genome, Viral ,Plant Science ,01 natural sciences ,Genome ,Plant Viruses ,law.invention ,03 medical and health sciences ,Cytopathogenic Effect, Viral ,law ,Animals ,Citrus leprosis disease ,Orchid fleck virus ,Cloning, Molecular ,Phylogeny ,Polymerase chain reaction ,Plant Diseases ,Whole genome sequencing ,Mites ,biology ,Nucleic acid sequence ,food and beverages ,biology.organism_classification ,Virology ,Plant Leaves ,030104 developmental biology ,RNA, Viral ,Brevipalpus phoenicis ,VETORES DE DOENÇAS DE PLANTAS ,Viral disease ,Agronomy and Crop Science ,010606 plant biology & botany - Abstract
Citrus leprosis (CL) is a viral disease endemic to the Western Hemisphere that produces local necrotic and chlorotic lesions on leaves, branches, and fruit and causes serious yield reduction in citrus orchards. Samples of sweet orange (Citrus × sinensis) trees showing CL symptoms were collected during a survey in noncommercial citrus areas in the southeast region of Brazil in 2013 to 2016. Transmission electron microscopy analyses of foliar lesions confirmed the presence of rod-like viral particles commonly associated with CL in the nucleus and cytoplasm of infected cells. However, every attempt to identify these particles by reverse-transcription polymerase chain reaction tests failed, even though all described primers for the detection of known CL-causing cileviruses and dichorhaviruses were used. Next-generation sequencing of total RNA extracts from three symptomatic samples revealed the genome of distinct, although highly related (>92% nucleotide sequence identity), viruses whose genetic organization is similar to that of dichorhaviruses. The genome sequence of these viruses showed
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- 2017
34. Cardinium syinbionts induce haploid thelytoky in most clones of three closely related Brevipalpus species.
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Groot, Thomas V. M. and Breeuwer, Johannes A. J.
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HAPLOIDY ,BREVIPALPUS ,FALSE spider mites ,BACTERIA ,MITOCHONDRIAL pathology ,ANTIBIOTICS ,FLOW cytometry ,MORPHOLOGY ,TAXONOMY ,MICROBIAL metabolites - Abstract
Bacterial symbionts that manipulate the reproduction of their host to increase their own transmission are widespread. Most of these bacteria are Wolbachia, but recently a new bacterium, named Cardinium, was discovered that is capable of the same manipulations. In the host species Brevipalpus phoenicis (Acari: Tenuipalpidae) this bacterium induces thelytoky by feminizing unfertilized haploid eggs. The related species B. obovatus and B. californicus are thelytokous too, suggesting that they reproduce in the same remarkable way as B. phoenicis. Here we investigated the mode of thelytokous reproduction in these three species. Isofemale lines were created of all three species and 19 lines were selected based on variation in mitochondrial COI sequences. All B. phoenicis and B. californicus lines (10 and 4 lines, respectively) produced males under laboratory conditions up to 6.7%. In contrast, males were absent from all B. obovatus lines (5 lines). Additional experiments with two B. phoenicis isofemale lines showed that males can be produced by very young females only, while older females produce daughters exclusively. For most lines it was shown that they are indeed feminized by a bacterium as treatment with antibiotics resulted in increased numbers of males up to 13.5%. Amplification and identification of specific gyrB sequences confirmed that those lines were infected with Cardinium. Three out of the five B. obovatus lines did not produce males after treatments with antibiotics, nor did they contain Cardinium or any other bacterium that might induce thelytoky. In these lines thelytoky is probably a genetic property of the mite itself. Despite the different causes of thelytoky, flow cytometry revealed that all 19 lines were haploid. Finally, the taxonomic inferences based on the mitochondrial COI sequences were incongruent with the classical taxonomy based on morphology, suggesting that a taxonomic revision of this group is necessary. [ABSTRACT FROM AUTHOR]
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- 2006
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35. Do domatia mediate mutualistic interactions between coffee plants and predatory mites?
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Matos, Cláudia H. C., Pallini, Angelo, Chaves, Fredson F., Schoereder, José H., and Janssen, Arne
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- *
MITES , *COFFEE , *PHYTOSEIIDAE , *RUBIACEAE , *ARACHNIDA , *HERBIVORES , *PREDATORY animals - Abstract
Many plant species possess structures on their leaves that often harbour predatory or fungivorous mites. These so-called domatia are thought to mediate a mutualistic interaction; the plant gains protection because mites decimate plant pathogenic fungi or herbivores, whereas the mites find shelter in the domatia. We tested this hypothesis using two species of coffee ( Coffea spp.) plants that posses domatia consisting of small cavities at the underside of the leaves, and which often harbour mites. We assessed densities of domatia, of the predatory mite Iphiseiodes zuluagai Denmark and Muma (Acari: Phytoseiidae) and of herbivorous mites Oligonychus ilicis (McGregor) (Acari: Tetranychidae) and Brevipalpus phoenicis (Geijskes) (Acari: Tenuipalpidae) on Coffea arabica L. (Rubiaceae) and Coffea canephora Pierre in the field. Over a period of 50 days, C. arabica harboured on average 7.5 times more predatory mites and 0.4–0.66 fewer prey mites than C. canephora. Hence, the higher density of predatory mites on C. arabica could not be explained by higher densities of prey. However, the density of domatia on C. arabica was on average 1.65 times higher than on C. canephora, and within each species, leaves with higher densities of domatia also harboured more predators. This suggests a positive effect of domatia on predatory mites. In the laboratory, survival of adult female predatory mites on leaves of C. arabica with open domatia was indeed significantly higher than on leaves with closed domatia. Hence, predatory mites benefited from the domatia. However, plants with higher densities of domatia did not harbour fewer herbivores. Taken together, our study only provides partial evidence for a mutualistic interaction between coffee plants and predatory mites, mediated by domatia. [ABSTRACT FROM AUTHOR]
- Published
- 2006
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36. Seasonal Abundance of Brevipalpus phoenicis (Acari: Tenuipalpidae) and Its Predators and Their Effects on Gerbera jamesonii Morphology
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Manal S. M. Ismail, Mona M. Ghallab, and Nahla A. . Elzohery
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education.field_of_study ,biology ,010405 organic chemistry ,Population ,Tenuipalpidae ,010402 general chemistry ,biology.organism_classification ,medicine.disease_cause ,01 natural sciences ,0104 chemical sciences ,Horticulture ,Infestation ,Gerbera jamesonii ,medicine ,Mite ,Brevipalpus phoenicis ,Acari ,education ,Nymph - Abstract
The objective of this research was to study the abundance and prevalence of Brevipalpus phoenicis and its predators on Gerbera jamesonii Bolus and its relation with different weather variables during a one-year study 2015 at Ismailia Governorate, Egypt. The abundance of B. phoenicis life stages was monitored monthly. The effects of mite's infestation on G. jamesonii morphology represented in leaf, flower, bud and flower deformity numbers during spring was considered, in addition to the photosynthetic pigments. Our results revealed great variations in mite population throughout the year. The highest density ofB. phoenicis adults, eggs, larvae, nymphs were recorded in January (50.25±6.08), May (71.85±8.57), January (31.40±4.71), July (74.43±8.73), respectively while the minimum density were recorded in October (4.10±0.83), September (10.30±2.09), August (1.95±0.46) and (16.10±2.50), respectively. Three predacious mites: Amblyseius cucumeris, Hemicheyletia wellsina, Tydeus sp. and one predacious insect Scolothrips longicornis were recorded.Negative correlations was recorded between B. phoenicis eggs or larvaewith S. longicornis (-0.122, -0.168), respectively. Significant negative correlations were observed between different B. phoenicis life stages, Tydeus sp. and S. longicornis with temperature and relative humidity. There were significant negative or positive correlations between life stages of B. phoenicis and the morphological characteristics of the plant. Highly significant negative correlation was recorded between mite infestation and photosynthetic pigments. In conclusion, G. jamesonii is recorded as a new host for B. phoenicis with a marked deformation in the plant morphology. In addition environmental factors had a great effect on its abundance.
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- 2016
37. Morphological and genetic characteristics ofBrevipalpus lewisi(Acari: Tenuipalpidae) and comparison with other threeBrevipalpusspecies
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Peng Su, Yan Wang, Liu Qun, Tian Zi Gu, Bin Qi Fan, Jesse A. Pfammatter, and De Jun Hao
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0106 biological sciences ,Brevipalpus ,biology ,Phylogenetic tree ,Chaetotaxy ,Zoology ,Tenuipalpidae ,biology.organism_classification ,010603 evolutionary biology ,01 natural sciences ,Metasequoia glyptostroboides ,010602 entomology ,Genetic distance ,Insect Science ,Botany ,Brevipalpus phoenicis ,Acari - Abstract
The flat mite, Brevipalpus lewisi McGregor was recently found infesting Metasequoia glyptostroboides Hu & Cheng (Taxodiaceae) in China. In order to accurately differentiate this species from other closely related Brevipalpus species and appropriately apply prevention and control strategies, this study focused on morphological description and identification of adults based on electron microscopy and molecular sequencing of the mitochondrial cytochrome oxidase subunit I gene. Morphological analyses showed significant differences and similarities between B. lewisi (McGregor), Brevipalpus phoenicis (Geijskes), Brevipalpus californicus (Banks) and Brevipalpus obovatus Donnadieu in the number and/or quality of dorsal setae, omega on tarsus II, dorsal cuticular patterns and leg chaetotaxy. Phylogenetic analyses of mitochondrial CO I gene fragment (342 bp) indicated B. lewisi is 86% homologous with the other three species. The genetic distance between B. lewisi host-associated populations of M. glyptostrob...
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- 2016
38. Detection and survey of coffee ringspot virus in Brazil
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Michael M. Goodin, T. O. Ramalho, Robert Wang, O. Jones, L. E. Harris, and Antonia dos Reis Figueira
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0301 basic medicine ,Molecular Sequence Data ,Sequence Homology ,Coffea ,Chenopodium quinoa ,Plant Viruses ,03 medical and health sciences ,Virology ,Plant virus ,Genetic variation ,Animals ,Cluster Analysis ,Plant Diseases ,Genetic diversity ,biology ,Reverse Transcriptase Polymerase Chain Reaction ,Host (biology) ,Coffea arabica ,Genetic Variation ,Sequence Analysis, DNA ,General Medicine ,biology.organism_classification ,Phylogeography ,030104 developmental biology ,RNA, Viral ,Brevipalpus phoenicis ,Rhabdoviridae ,Brazil - Abstract
Coffee ringspot virus (CoRSV) a member of the proposed genus "Dichorhavirus", was surveyed on commercial and research farms spanning an area responsible for the majority of Coffea arabica production in Brazil. Virus-infected plants were found at one hundred percent of locations (n = 45) sampled. All cultivars, regardless of cherry color, were found to serve as hosts, suggesting that there is limited resistance in commercially employed germplasm. Reverse transcription PCR analysis revealed that the virus is contained within symptomatic lesions, with little systemic spread throughout leaves. Phylogenetic analysis based on the ORF1 (nucleocapsid) gene identified a strong geo-spatial relationship among isolates, which clustered into three clades. Despite low genetic diversity among isolates, variation in symptom expression was observed in the experimental host Chenopodium quinoa. Our analyses support the hypothesis that the spread of CoRSV is constrained by the clonal expansion of thelytokous populations of Brevipalpus phoenicis. The widespread occurrence of this virus suggests that it is much more prevalent than previously thought.
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- 2015
39. Interactions between Host Plants and Biofertilizers: Contact Effect on Biological Parameters of the Mite Brevipalpus phoenicis
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Maria José Araújo Wanderley, S Silveira Neto, Marcos Barros de Medeiros, Sérgio Batista Alves, and Aline de Holanda Nunes Maia
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Horticulture ,biology ,Canavalia ensiformis ,Biofertilizer ,Mite ,Bioassay ,Brevipalpus phoenicis ,Acari ,Tenuipalpidae ,biology.organism_classification ,Ligustrum lucidum - Abstract
This study was conducted aiming to evaluate interactions between deleterious action of biofertilizers on Brevipalpus phoenicis (Geijskes) (Acari: Tenuipalpidae) and host plants. In the first bioassay the following concentrations were tested: 0% (control), 5%, 15%, 30% and 50%. The experimental unit was a leaf of Ligustrum lucidum plant (six leaves per treatment). Twelve mites were liberated in arenas on each leaf. The second bioassay was run on 20 days old Canavalia ensiformis plants, using ten plants per treatment. Ten mites were transferred for arenas on each host plant cotyledonal leaf. Five concentrations were also tested: 0%, 5%; 10%; 20% and 30%. The adult female mortality and the number of eggs laid in each arena were quantified daily during 72 h in the first assay and 120 h in the second one. The mite survivorship and oviposition were significantly reduced with the increase of biofertilizer concentration in both experiments. The LC25 estimates for the 24, 48 and 72 h periods were respectively 50,04; 15,70 and 4,95% in L. lucidum. The LC25 andLC50 estimates for the 24, 48, 72,96 and 120 h periods in C. ensiformis were 8,15; 7,78; 0,63; 0,68 and 0,63 and of 19,64; 19,03; 2,38; 2,60 and 2,67, respectively. No LC50estimates were obtained in L. lucidum, due the low mortality rates. The biofertilizer had deleterious action on fertility and survival of B. phoenicison both host plants, being more severe on C. ensiformis. The mites dead by the biofertilizer action showed evidences of microbial colonization. A colloidal compound of the biofertilizer induced mite immobilization and obstruction in its digestive tract.
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- 2018
40. IMPACT OF RAINFALLS ON THE ACARICIDE PROPARGITE WITH AND WITHOUT ADDITION OF ADJUVANTS FOR THE CONTROL OF THE MITE Brevipalpus yothersi
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Jéssica Sanches, Daniel Júnior de Andrade, Marcelo da Costa Ferreira, and Universidade Estadual Paulista (Unesp)
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0106 biological sciences ,Brevipalpus phoenicis ,medicine.medical_treatment ,Plant Science ,lcsh:Plant culture ,01 natural sciences ,Propargite ,Toxicology ,chemistry.chemical_compound ,Leprose-dos-citros ,Mite ,medicine ,Citrus leprosis disease ,lcsh:SB1-1110 ,Brevipalpus ,biology ,Acaricide ,food and beverages ,Depósito de calda ,04 agricultural and veterinary sciences ,CiLV ,biology.organism_classification ,chemistry ,040103 agronomy & agriculture ,0401 agriculture, forestry, and fisheries ,Agronomy and Crop Science ,Adjuvant ,Citrus × sinensis ,Spray deposition ,010606 plant biology & botany ,Food Science ,Citrus sinensis - Abstract
Rainfalls may affect the efficiency of pesticides due to a decreased deposit of active ingredient on plants. This should be considered in spraying with acaricides, the main strategy used for the management of citrus leprosis, the main viral disease of the Brazilian citrus culture. Citrus leprosis disease is transmitted by Brevipalpus mites, mainly B. yothersi. The objective of this study was to evaluate the effects of artificial rains on the efficiency of the acaricide propargite in combination or not with adjuvants for the control of the mite B. yothersi. The experiment was conducted using orange plants grown in pots kept under greenhouse conditions. The acaricide propargite was evaluated isolated and with addition of the adjuvants polydimethylsiloxane (20mL cp/100 L of water) and a mixture of phosphatidylcholine (lecithin) and propionic acid (500 mL cp/100 L of water). After the application of the acaricide with and without the adjuvants, the plants were subjected to a 10-mm artificial rainfall at different time intervals: 5 minutes, and 1 and 12 hours after application. Thereafter, B. yothersi mites were transferred to plants for survival evaluation. The artificial rainfall affected negatively the efficiency of propargite isolated and in mixture. The addition of the adjuvant phosphatidylcholine and propionic acid impaired the efficiency of propargite due to an increased runoff of the broth and a decrease in the deposit of active ingredients on plants. We conclude that the acaricide propargite should not be used in combination with the adjuvants polydimethylsiloxane and mixture of phosphatidylcholine and propionic acid in rainy conditions. RESUMO Chuvas podem afetar a eficiência dos agrotóxicos devido à redução do depósito de ingrediente ativo sobre as plantas. Esse é um fator que deve ser considerado nas pulverizações com acaricidas, principal estratégia utilizada no manejo da leprose-dos-citros, principal doença viral da citricultura brasileira. A leprose-dos-citros é transmitida por ácaros Brevipalpus, com destaque para Brevipalpus yothersi. O objetivo do trabalho foi avaliar o efeito de chuva artificial sobre a eficiência do acaricida propargite em mistura ou não com adjuvantes no controle do ácaro B. yothersi. O experimento foi conduzido utilizando plantas de laranja cultivadas em vasos e mantidas em casa de vegetação. O acaricida propargite foi avaliado isolado e com adição dos adjuvantes polidimetilsiloxano (20mL p.c./100L de água) e mistura de fosfatidilcoline (lecitina) e ácido propiônico (500mL p.c./100L de água). Após a aplicação do acaricida com e sem os adjuvantes, as plantas foram submetidas a chuva artificial de 10 mm, em diferentes intervalos de tempo, a 5 minutos, 1 e 2 horas após a aplicação. Em seguida, foram transferidos para as plantas ácaros B. yothersi para avaliação da sobrevivência. A chuva artificial afetou negativamente a eficiência do propargite aplicado isolado e em mistura. A adição do adjuvante fosfatidilcoline e ácido propiônico prejudicou a eficiência do propargite, devido ao maior escorrimento da calda e à redução do depósito de ingrediente ativo sobre as plantas. Conclui-se que o acaricida propargite não deve ser utilizado em associação com os adjuvantes polidimetilsiloxano e mistura de fosfatidilcoline e ácido propiônico em condições de chuva.
- Published
- 2018
41. Ricoseius loxocheles (Acari: Phytoseiidae) is not a predator of false spider mite on coffee crops: What does it eat?
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Henry E Vacacela Ajila, Angelo Pallini, Madelaine Venzon, João A. M. Ferreira, Felipe Colares, Ana Maria Guimarães Bernardo, and Cleber M. Oliveira
- Subjects
0106 biological sciences ,Phytoseiidae ,Food Chain ,Longevity ,Predation ,Tenuipalpidae ,Coffee leaf rust ,medicine.disease_cause ,01 natural sciences ,Rust ,Spider mite ,Pollen ,medicine ,Animals ,Alternative foods ,Hemileia vastatrix ,Mites ,Ecology ,biology ,Reproduction ,Fungi ,General Medicine ,biology.organism_classification ,Diet ,010602 entomology ,Horticulture ,Insect Science ,Bee pollen ,Larva ,Biological control ,Brevipalpus phoenicis ,Female ,010606 plant biology & botany - Abstract
Ricoseius loxocheles (De Leon) (Acari: Phytoseiidae) is often found in coffee crops and is known to feed on coffee leaf rust, Hemileia vastatrix Berkeley and Broome (Uredinales). As the occurrence of coffee leaf rust is limited primarily to the rainy season, the mite may use other food sources to survive during the periods of low pathogen prevalence. It is well known that phytoseiid mites can survive on a variety of food sources, such as herbivorous mites, fungi and pollen. We evaluated the ability of R. loxocheles to survive and reproduce on a diet of Brevipalpus phoenicis Geijskes (Acari: Tenuipalpidae), cattail pollen (Typha spp.), clover rust (Puccinia oxalidis), bee pollen (Santa Barbara® dehydrated pollen, Santa Barbara, MG, Brazil) and coffee leaf rust. Ricoseius loxocheles did not survive or reproduce on any B. phoenicis stages tested (egg, larva, adult). The survival and oviposition of R. loxocheles were directly affected by the presence of coffee rust urediniospores, but not by the presence of the prey. Survival and oviposition of the phytoseiid were similar when fed cattail pollen, clover rust and coffee leaf rust but was lower when fed bee pollen. Our results show that R. loxocheles is not a predator of B. phoenicis but it is able to utilize other resources besides coffee leaf rust.
- Published
- 2018
42. Infestation dynamics of Brevipalpus phoenicis (Geijskes) (Acari: Tenuipalpidae) in citrus orchards as affected by edaphic and climatic variables
- Author
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Juliana Freitas-Astúa, Ana Cristina Fermino Soares, Décio de Oliveira Almeida, Tibério Santos Martins da Silva, Suely Xavier de Brito Silva, Francisco Ferraz Laranjeira, and Eduardo C. Andrade
- Subjects
Citrus ,Food Chain ,Climate ,Population Dynamics ,Tenuipalpidae ,Biology ,medicine.disease_cause ,Soil ,Evapotranspiration ,Botany ,Infestation ,medicine ,Animals ,Relative humidity ,Acari ,Ecology ,food and beverages ,Edaphic ,General Medicine ,biology.organism_classification ,Horticulture ,Animal ecology ,Insect Science ,Brevipalpus phoenicis ,Orchard ,Brazil - Abstract
Brevipalpus phoenicis (Geijskes) is a cosmopolitan and polyphagous mite that transmits important phytoviruses, such as coffee ringspot virus, passion fruit green spot virus and Citrus leprosis virus C. To characterise the dynamics of the probability and the rate of B. phoenicis infestation in response to edaphic and climatic factors, monthly inspections were performed in nine orchards in a citrus region of the State of Bahia, Brazil, for 35 months. Three fruits per plant were examined using a magnifying glass (10×) on 21 plants distributed along a “W”-shaped path in each orchard. Meteorological data were collected from a conventional station. To determine the correlations among the climatic variables, the data were analysed using Spearman correlations. Variables were selected by principal component analysis, and those that contributed the most to differentiate the groups were evaluated via a Mann–Whitney test. Using the quantile–quantile method, the limit values for the following climatic variables were determined: temperature (24.5 °C), photoperiod (12 h), relative humidity (83 %), evapotranspiration (71 mm) and rainy days (14 days). The combination of longer days, higher temperatures, lower relative humidity levels and lower evapotranspiration increased the probability of B. phoenicis infestation, whereas successive rain events decreased that risk. Infestation rates were negatively affected by relative humidity levels above 83 % and were positively affected by a decreasing available soil–water fraction and increasing insolation and photoperiod.
- Published
- 2015
43. Detección del virus de la leprosis de los cítricos tipo 2 citoplasmático (CiLV-C2) en los departamentos de Meta y Casanare
- Author
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Guillermo León, Ronald H. Brlansky, Nandlal Choudhary, and Avijit Roy
- Subjects
biology ,CpG site ,Specific primers ,Brevipalpus phoenicis ,Citrus leprosis virus cytoplasmic type ,General Agricultural and Biological Sciences ,biology.organism_classification ,Virology ,Citrus × sinensis ,Virus - Abstract
Este estudio trata del diagnóstico y detección del nuevo virus de la leprosis de los cítricos tipo 2 citoplasmático (CiLV-C2) en muestras colectadas en los departamentos del Meta y Casanare, mediante técnicas moleculares RT-PCR realizadas sobre tejido vegetal y ácaros vectores Brevipalpus phoenicis (Geijskes). Para las pruebas de detección RT-PCR se utilizaron los iniciadores específicos MP y CPG. Con los iniciadores CPG, se logró la detección del CiLV-C2, en muestras de tejido vegetal con síntomas de leprosis en frutos y hojas de naranja valencia (Citrus sinensis L.) y hojas de Swinglea gluinosa Merr., lo cual confirma la presencia de este virus en Colombia. Los iniciadores MP no detectaron el virus CiLV-C2 en ninguna de las pruebas realizadas. La técnica RT-PCR permitió detectar el virus CiLV-C2 en muestras de ácaros vectores B. phoenicis, cuando se utilizaron los iniciadores específicos CPG. La detección molecular del CiLV-C2, mediante la técnica RT-PCR, se constituye en un instrumento fundamental para el diagnóstico del virus en Colombia y debe ser usada en los programas de detección y prevención de la leprosis de los cítricos en el país.
- Published
- 2015
44. Resistance to spirodiclofen in Brevipalpus yothersi (Acari: Tenuipalpidae) from Brazilian citrus groves: detection, monitoring, and population performance.
- Author
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M Rocha C, F Della Vechia J, J Savi P, Omoto C, and J Andrade D
- Subjects
- 4-Butyrolactone analogs & derivatives, Animals, Brazil, Female, Citrus, Mites, Spiro Compounds
- Abstract
Background: Brevipalpus yothersi mite is the main vector of Citrus leprosis virus (CiLV), the causal agent of citrus leprosis disease. The acaricide spirodiclofen has been widely used to control this mite. However, failures in control using spirodiclofen have been frequently reported by citrus growers. In this study, we estimated the diagnostic concentration to monitor the resistance to spirodiclofen of B. yothersi populations collected in nine citrus groves in Brazil. We then selected the B. yothersi population that showed lowest mortality with the estimated diagnostic concentration of spirodiclofen to characterize the frequency of resistant individuals, as well as demographic and life table parameters., Results: Variability was higher between populations in terms of susceptibility to spirodiclofen. The frequency of resistant eggs between populations ranged from 0.7% to 85.8%. The resistance ratio of B. yothersi to spirodiclofen was low to moderate. Survival rates of the immature stage, total adult longevity, oviposition days, and female fecundity were lower in the resistant strain. Furthermore, net reproduction rate, intrinsic rate of increase, finite rate of increase, and mean length of a generation were also lower in the R strain., Conclusion: Although variations in resistance to spirodiclofen were observed between populations, the resistance ratio was low to moderate. Such data can be useful in the development of resistance management strategies for B. yothersi in Brazilian citrus groves. © 2021 Society of Chemical Industry., (© 2021 Society of Chemical Industry.)
- Published
- 2021
- Full Text
- View/download PDF
45. Factors affecting prevailing population levels of Brevipalpus yothersi (Acari: Tenuipalpidae) in citrus areas affected by citrus leprosis in the State of Sao Paulo, Brazil
- Author
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G. J. de Moraes, Cirano Cruz Melville, Daniel Júnior de Andrade, Ingrid Amaral, and Universidade Estadual Paulista (Unesp)
- Subjects
0106 biological sciences ,Veterinary medicine ,Citrus ,Brevipalpus phoenicis ,Population ,Population Dynamics ,Brevipalpus species complex ,Tenuipalpidae ,01 natural sciences ,Mite ,Animals ,Acari ,Population dynamics ,education ,Life History Traits ,Plant Diseases ,education.field_of_study ,Mites ,Biological parameters ,Ecology ,biology ,Flat mites ,food and beverages ,General Medicine ,biology.organism_classification ,010602 entomology ,Fertility ,Animal ecology ,Insect Science ,Rhabdoviridae ,Citrus × sinensis ,Brazil ,Citrus sinensis ,010606 plant biology & botany - Abstract
Made available in DSpace on 2018-12-11T16:52:13Z (GMT). No. of bitstreams: 0 Previous issue date: 2018-04-01 Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) Brevipalpus yothersi Baker (Acari: Tenuipalpidae) was recently confirmed as one of the main vectors of citrus leprosis. Knowledge about this mite’s biology is essential to understand its population dynamics, in order to solve management issues in citrus orchards and explain why citrus leprosis is more severe in some regions. This paper aimed to study biological factors affecting prevailing population levels of B. yothersi and incidence of citrus leprosis. Mites were sampled from orchards in the south, north and northwestern regions of São Paulo State, Brazil. We assessed duration of the developmental stages, oviposition, incubation period, egg viability, longevity, net reproductive rate (Ro), mean generation time (T), intrinsic rate of increase (rm) and finite rate of increase (λ). There were small differences in parameter values between the three populations. Our results indicated that the various measures adopted in the control of the three populations did not lead to major biological differences between populations for the evaluated parameters. School of Agricultural and Veterinary Sciences (UNESP/FCAV) UNESP - São Paulo State University, Via de Acesso Prof. Paulo Donato Castellane, s/nº School of Agricultural and Veterinary Sciences (UNESP/FCAV) UNESP - São Paulo State University, Via de Acesso Prof. Paulo Donato Castellane, s/nº
- Published
- 2017
46. Diversity of mites (Acari) in vineyard agroecosystems (Vitis vinifera) in two viticultural regions of Rio Grande do Sul state, Brazil
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Gervásio Silva Carvalho, Noeli Juarez Ferla, LianaJohann, and Tamara Bianca Horn
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0106 biological sciences ,Panonychus ulmi ,biology ,04 agricultural and veterinary sciences ,15. Life on land ,biology.organism_classification ,Acariformes ,01 natural sciences ,Vineyard ,010602 entomology ,Insect Science ,Botany ,040103 agronomy & agriculture ,Mite ,0401 agriculture, forestry, and fisheries ,Pronematus ,Brevipalpus phoenicis ,Acari ,Species richness - Abstract
The aim of this work was to study mite diversity in vineyard plots planted with Cabernet Sauvignon and Pinot Noir cultivars and on associated non-cultivated plants in two viticultural regions of Rio Grande do Sul State, Brazil. Monthly assessments of leaves and buds of vines and of non-cultivated plants were undertaken between October 2006 and September 2007. Twelve thousand mites belonging to 17 families and 46 genera and representing 61 mite species were collected. The most abundant phytophagous mites were Calepitrimerus vitis, Colomerus vitis and Panonychus ulmi on grapevines. Among the predatory mites, the most abundant were Neoseiulus californicus and Agistemus floridanus. The non-cultivated plants species that showed the greatest richness of mites were Plantago tomentosa, Plantago lanceolata and Senecio sp. The most abundant phytophagous mites on non-cultivated plants were Tetranychus ludeni and Brevipalpus phoenicis in the viticultural regions of Bento Goncalves and Candiota, respectively, and Pronematus anconai was generally the most abundant predatory mite. In the region of Bento Goncalves, species richness and abundance in the agroecosystem were far higher than in the region of Candiota.
- Published
- 2014
47. Experimental host range of Citrus leprosis virus C (CiLV-C)
- Author
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Aline Daniele Tassi, Renato B. Salaroli, E. W. Kitajima, Gerson Oliveira Romão, Laura Cristina Garita, Renata Faier Calegario, and Juliana Freitas-Astúa
- Subjects
Brevipalpus phoenicis ,biology ,Inoculation ,citrus leprosis ,Citrus leprosis virus C ,food and beverages ,biology.organism_classification ,Virology ,Virus ,law.invention ,Pathosystem ,VÍRUS DE PLANTAS ,law ,Quarantine ,Plant species ,Mite ,epidemiology - Abstract
Citrus leprosis (CL) is a serious threat to the citrus industry, especially for sweet oranges. For a long time, Citrus spp. were considered the only susceptible hosts. However, other plant species were also found either experimentally or naturally to be susceptible to Citrus leprosis virus C (CiLV-C). To assess the experimental host range of CiLV-C, a large number of plant species were inoculated with Brevipalpus phoenicis, viruliferous to CiLV-C, under experimental conditions. Out of the 140 tested species (43 families), 59 species (24 families) developed localized chlorotic and/or necrotic lesions upon inoculation of leaves with viruliferous mites, and 40 species (18 families) of them yielded positive results for CiLV-C detection in at least one of the following assays: ELISA, RT-PCR, transmission electron microscopy and immunfluorescence. For those that developed lesions and yielded negative results in CiLV-C detection assays, the results may be attributed to the small number of lesions and their necrotic state with very little viral material. The fact that a considerable number of plant species are susceptible to the virus after mite inoculation brings up implications for the epidemiology, quarantine and evolution of the citrus leprosis pathosystem.
- Published
- 2014
48. CyazypyrTM Selectivity for Three Species of Phytoseiid for Coffee and Other Relevant Agricultural Crops in Brazil
- Author
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Melissa Alves Toledo, Fabio Maximiano Andrade Silva, and Paulo Rebelles Reis
- Subjects
Phytoseiidae ,biology ,Acaricide ,Coffea ,Tenuipalpidae ,General Medicine ,biology.organism_classification ,Toxicology ,Euseius ,chemistry.chemical_compound ,chemistry ,Botany ,Brevipalpus phoenicis ,Cyantraniliprole ,Acari - Abstract
Mites belonging to the family Phytoseiidae are the most important and most widely studied among predatory mites of phytophagous mites. The phytophagous mites Brevipalpus phoenicis (Geijskes, 1939) (Tenuipalpidae) and Oligonychus ilicis (McGregor, 1917) (Tetranychidae) on coffee (Coffea spp.), are frequently found in combination with the predaceous mites Iphiseiodes zuluagai Denmark & Muma, 1972; Euseius alatus DeLeon, 1966 and Amblyseius herbicolus (Chant, 1959) (Acari: Phytoseiidae), among others. The purpose of this research was to study the effects of the product CyazypyrTM (cyantraniliprole 100 OD) on these three species of Phytoseiidae, relevant to coffee, citrus and other agricultural crops in Brazil, following standard laboratory procedures. Mated female mites were exposed to fresh-dried residues on a glass surface, with 8 treatments, 5 mites per glass plate and 6 replicates, in a completely randomized experimental design. Each test lasted eight days, with a daily count of the surviving females and of eggs laid. CyazypyrTM, in all tested doses (75, 100, 125, 150, 175 and 200 g a.i./ha), was selective for the studied species, A. herbicolus, I. zuluagai, and E. alatus. Overall the treatments resulted in low mortality rates and negligible impact on the reproduction. Therefore, based on IOBC standards, CyazypyrTMcan be classified as not harmful (class 1) or slightly harmful (class 2), comparable to the agrochemical TalentoTM (hexythiazox 500 WP-12 g a.i./ha) equivalent to a harmless standard of selectivity in the laboratory. CyazypyrTM is therefore a complement to programs of integrated pest management, to preserve the populations of predatory mites in crops of coffee and citrus, among others, in Brazil.
- Published
- 2014
49. DISTRIBUIÇÃO ESPACIAL E AMOSTRAGEM SEQUENCIAL DE Brevipalpus phoenicis EM CITRUS
- Author
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Paulo Gonçalves, José Carlos Barbosa, Marilia Gregolin Costa, Tiago Santos, and Walter Maldonado
- Subjects
0106 biological sciences ,binomial negativa ,Negative binomial distribution ,Plant Science ,lcsh:Plant culture ,Poisson distribution ,Spatial distribution ,01 natural sciences ,decision making ,manejo integrado de pragas ,red and black flat mite ,symbols.namesake ,Goodness of fit ,Sequential probability ratio test ,Statistics ,lcsh:SB1-1110 ,Mathematics ,biology ,integrated pest management ,business.industry ,decisão de controle ,Pest control ,biology.organism_classification ,negative binomial ,distribuição de Poisson ,010602 entomology ,ácaro da leprose ,symbols ,Brevipalpus phoenicis ,PEST analysis ,business ,Agronomy and Crop Science ,010606 plant biology & botany ,Food Science - Abstract
Among the pests of citrus, one of the most important is the red and black flat mite Brevipalpus phoenicis (Geijskes), which transmits the Citrus leprosis virus C (CiLV-C).When a rational pest control plan is adopted, it is important to determine the correct timing for carrying out the control plan. Making this decision demands constant follow-up of the culture through periodic sampling where knowledge about the spatial distribution of the pest is a fundamental part to improve sampling and control decisions. The objective of this work was to study the spatial distribution pattern and build a sequential sampling plan for the pest. The data used were gathered from two blocks of Valencia sweet orange on a farm in São Paulo State, Brazil, by 40 inspectors trained for the data collection. The following aggregation indices were calculated: variance/ mean ratio, Morisita index, Green’s coefficient, and k parameter of the negative binomial distribution. The data were tested for fit with Poisson and negative binomial distributions using the chi-square goodness of fit test. The sequential sampling was developed using Wald’s Sequential Probability Ratio Test and validated through simulations. We concluded that the spatial distribution of B. phoenicis is aggregated, its behavior best fitted to the negative binomial distribution and we built and validated a sequential sampling plan for control decision-making. RESUMO Dentre as pragas dos citros, uma das mais importantes é o ácaro da leprose Brevipalpus phoenicis (Geijskes), que transmite o vírus da leprose dos citros (CiLV-C). Quando um plano racional de controle de pragas é adotado, é importante se determinar o tempo correto para se dar início ao plano de controle. Para tanto, é necessário acompanhamento constante da cultura através de amostragens periódicas, onde o conhecimento do comportamento espacial da praga é fundamental. O objetivo deste trabalho foi estudar o padrão de distribuição espacial e desenvolver um plano de amostragem sequencial para a praga. Os dados utilizados foram coletados em dois talhões de laranja Valência em uma fazenda no estado de São Paulo, Brasil, por 40 inspetores treinados para a atividade. Foram calculados os seguintes índices de agregação: variância/média, índice de Morisita, coeficiente de Green e parâmetro k da distribuição binomial negativa. Foi testado o ajuste dos dados às distribuições de Poisson e binomial negativa utilizando o teste de quiquadrado de aderência. O plano de amostragem foi desenvolvido utilizando o Teste Sequencial da Razão de Verossimilhança de Wald e validado através de simulações. Foi concluído que a distribuição espacial de B. phoenicis é agregada, seu comportamento espacial pode ser explicado e previsto através da distribuição binomial negativa e foi construído e validado um plano de amostragem sequencial para a tomada de decisão sobre seu controle.
- Published
- 2016
50. EFFICACY OF CERTAIN ACARICIDES AGAINSTTEGOLOPHUS GUAVAE AND BREVIPALPUS PHOENICIS ON GUAVA TREES
- Author
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Ashraf S. El-Halawany and Karm E. Mohamed
- Subjects
Psidium ,education.field_of_study ,Brevipalpus ,Acaricide ,Population ,Biology ,biology.organism_classification ,chemistry.chemical_compound ,Horticulture ,chemistry ,Abamectin ,Mite ,Brevipalpus phoenicis ,Tetranychus urticae ,education - Abstract
In the recent years Guava trees were infested with the rust mite Tegolophus guavae (Boczek) and Tenuipalpid mite Brevipalpus phoenicis (Geijskes) El-Halawany and Abou-Setta (2014). Inspection of guava trees showed that the population abundance of phytophagous mite, T. guavae was high on leaves and B. phoenicis was high on leaves and fruits. The present investigations were carried out to evaluate eight acaricides, (Agromic, Deva, Berfect, Nest, Baroq, Koncor, Menova and Ortus) against T. guavae and B. phoenicis under field conditions. Results indicated that Ortus, Menova, Agromic and Baroq were the most effective compounds in reducing guava rust mite population, T. guavae followed by Deva, Berfect and Koncor which gave good reduction over (86.0%), while Nest was the lowest (72% mortality). The reduction percentage of B. phoenicis after three weeks of application was 84% mortality, the highest reduction was recorded for Ortus 5% (90%) on leaves and fruits. INTRODUCTION The guava rust mite T. guavae was recorded for the first time in Egypt on Psidium guajava L. by El-Halawany (2012) at Qalubia Governorate. After that ecological studies were done studied by (El-Halawany & Abou-Setta, 2014). on guava indicated that T. guavae inhabiting leaves in February then increased in the number and reach maximum number in June and October especially on young leaves. On the other hand, the Tenuipalpid mite B. phoenicis inhabiting leaves in march and infested fruit after fruit setting and increased in the number in July on leaves and June on fruit causes brown-reddish. In Florida, USA, the mite T. guavae and Brevipalpus spp., cause damage to fruits and tender leaves (Pena et al., 1999). Highest numbers of T. guavae are observed in early autumn, winter and spring months. The mites are most often observed on fruit, causing deformations. The tenuipalpid mite, Brevipalpus phoenicis (Geijskes) is an important pest of more than 50 genera of ornamental plants, it's evidently well distributed throughout the world, this mite transmit virus leprosies when population are high (Jeppson et al., 1975), also Zaher (1984) found B. phoenicis is a principal of citrus, other hosts include guava, quince, sweet potato and acalypha, prefere the lower surfaces of leaves around the midrib and main veins, they were found also in pits, pedical and floral apex of fruits. EFFICACY OF CERTAIN ACARICIDES AGAINST TEGOLOPHUS GUAVAE AND BREVIPALPUS PHOENICIS ON GUAVA TREES 1460 Many researchers studied the effect of some acaricides against phytophagous mites. Rezk (1998) evaluated the two acaricides, Ortus (fenpyroximate) and Neoron (bromopropylate), on Brevipalpus obovatus on citrus orchards in Egypt. On fig trees, abamectin showed a promising control against Tetranychus urticae, Rhyncophytoptus ficifoliae and Aceria ficus it caused reduction of 85%, 75% and 68% in population, respectively (Abou-Awad et al., 2000). (Abou-Awad et al., (2005) showed the effect of abamectin on eriophyid olive mites, the results indicate that abamectin gave reduction of 85.40 % and 88.90 % in the population of Aceria oleae and Tegolophus hassani on leaves, respectively, during the 35-day period following applications. Similar results of abamectin biocide against eriophyid mites were found on citrus in Florida (Childers, 1986). Tayyib et al. (2005) in Pakistan evaluated new insecticides for controlling T. urticae on cotton. The chlorfenapyr gave highest mortality (87.5%), also fenpyroximate gave (63.75%), while the dicofol and azocyclotin gave less than 50% mortality. AL-Joboory and AL-Jorany (2011) found that the efficacy some Acaricides (Envidor 240 SC, Ortus 5% SC, Bye Bye 20 EC, King bow 24 ES and Abamectin 1.8% EC) were a high sufficiency in controlling the mites and gave longer protection duration for the plants. Al-Azzazy et al. (2013) indicated that the Abamectin was superior in reducing Aceria tulipae (79% reduction) after 28 days. This study aims to evaluate of certain acaricides for controlling T. guavae and B. phoenicis on Guava trees in Qalubia governorate.
- Published
- 2013
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