7 results
Search Results
2. PROSPECTS FOR THE BIOLOGICAL CONTROL OF WEEDS IN ARGENTINA.
- Author
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Anderson, F.E., Zalba, S.M., Ansaldi, J., Sosa, A, Mc Kay, F., and Cabrera Walsh, G.J.
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BIOLOGICAL weed control , *AGRICULTURE , *INTRODUCED species , *PUBLIC support , *PHYSIOLOGICAL control systems , *INVASIVE plants - Abstract
• Classical weed biological control is hardly practiced in Argentina today. • There is a small community of local experts that work mostly for overseas projects. • The National Strategy on Invasive Alien Species promotes biocontrol initiatives. • A prioritization process is developed to select the best target(s) for biocontrol. • Public awareness and outreach activities could help gain biocontrol public support. Argentina hosted pioneering classical weed biological control projects that were carried out by state institutions between the 1970s and 1990s, at a time when the practice was almost unheard of in Latin America. Despite the early development of these initiatives, the discipline did not prosper and all projects were discontinued. Notwithstanding, Argentina continued to provide biological control agents for the control of weeds in many other parts of the world, ensuring the expertise persisted. Although public concern about invasive plants and chemical-dependent agricultural practices has increased over time, it did not lead to a greater acceptance of classical biological control of weeds, which is still regarded with mistrust or ignored in many public and academic circles alike. Furthermore, there are no systems in place to reach a consensus on declaring weeds as targets for biological control in Argentina. In this paper we discuss different ways in which the community of researchers working in the field in Argentina can help relaunch the biological control of weeds, including the preparation of a prioritized list of target species. A list of this kind would not only reduce costs, but also help in developing trust in the discipline of biological control informing regulators and decision makers in this regard. Prospects are brighter today than a few years ago, but considerable communication and educational work on the benefits of this practice is still required to gain more support before it can effectively be re-implemented. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
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3. Analysis of Trichoderma as an effective biological control agent against the honey fungus (Armillaria spp.).
- Author
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Poveda, Jorge, Millen, Morgan R., and Bailey, Andy M.
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TRICHODERMA , *ROOT rots , *HONEY , *MYCOSES , *PLANT colonization , *AGRICULTURE - Abstract
• Trichoderma spp. is a BCA widely studied and used in agriculture. • Armillaria spp. is a globally important pathogen of agricultural/forestry species. • So far, there are 30 studies on the effective control of ARR by Trichoderma. • Trichoderma effectively control Armillaria in different experimental conditions. • So far, there are four mechanisms of action identified in this biological control. • More research is needed on the use of Trichoderma against Armillaria. Trichoderma is a genus of filamentous fungi with several species widely studied and used as biological control agents (BCAs) in agriculture. With respect to fungal disease control, Trichoderma spp. can use different mechanisms of action, including mycoparasitism, antibiosis, competition and/or activation of plant defences. Armillaria spp. are the causal pathogens of Armillaria root rot (ARR) disease, which is widely distributed and of great economic and environmental importance in agriculture and forestry. ARR can be devastating to plant health, through colonisation and rotting of the root system and collar of the infected plant/tree, which can cause a reduction in yield and eventually death. Armillaria can live as a saprophyte that survives on dead plant material, making eradication of ARR extremely difficult. In an exhaustive analysis of work published to date on the control of Armillaria spp. by Trichoderma spp., using the WoS and Scopus databases, we identified 31 papers. We discuss these reports in light of their key findings, including number of publications per year, the countries where they were published, the journals and the citations obtained so far. Although the vast majority do not identify the mechanism of action involved in control, some describe mycoparasitism, antibiosis, competition or modification of the rhizospheric microbiota as being responsible for effective biological control of the pathogen. Further research into these mechanisms and additional in-depth analysis of less studied or currently unidentified mechanisms, such as the activation of plant defences, would be highly beneficial to our understanding of Trichoderma as a BCA of Armillaria. [ABSTRACT FROM AUTHOR]
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- 2024
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4. RETRACTED: Biocontrol of Fusarium wilt in tomato by Trichoderma spp.
- Author
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Liu, Qingchun, Zhang, Shouan, and De Cote, Jose Antonio
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FUSARIUM , *AUTHOR-editor relationships , *COLLEGE buildings , *TOMATOES , *FUSARIUM oxysporum , *APOLOGIZING , *TRICHODERMA - Abstract
This article has been retracted: please see Elsevier Policy on Article Withdrawal (https://www.elsevier.com/about/policies/article-withdrawal). This article has been retracted at the request of the authors. The strains T. atroviride T11 and T. asperellum T25 are property of the University of Salamanca. Post publication, the authors informed the editor that the material transfer agreement (MTA) between the project sponsor (iQBiotech LLC.) and the owner (University of Salamanca) of the Trichoderma strains tested in this study had been terminated. The authors did not have permission to publish work done with these strains and have therefore requested the retraction of this paper. The authors wish to the apologize to the University of Salamanca and to the readers. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
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5. Field assessment of microbial inoculants to control Rhizoctonia root rot on wheat
- Author
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Christopher M. M. Franco, Ross Ballard, and Stephen J. Barnett
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0106 biological sciences ,biology ,Crop yield ,fungi ,Biological pest control ,Biocontrol ,food and beverages ,Sowing ,field trials ,biology.organism_classification ,Rhizoctonia ,01 natural sciences ,Streptomyces ,Rhizoctonia solani ,010602 entomology ,Paenibacillus ,Horticulture ,wheat ,Insect Science ,Root rot ,Agronomy and Crop Science ,Microbial inoculant ,010606 plant biology & botany - Abstract
© 2019 Elsevier Inc. This manuscript version is made available under the CC-BY-NC-ND 4.0 license: http://creativecommons.org/licenses/by-nc-nd/4.0/ This author accepted manuscript is made available following 12 month embargo from date of publication (February 2019) in accordance with the publisher’s archiving policy, Rhizoctonia root rot caused by Rhizoctonia solani AG8 is a major disease in dryland cereal crops. Previous research identified a suite of microbes using in planta bioassay screening that are effective as seed-coated inoculants for control of Rhizoctonia root rot on wheat. This paper assessed 23 strains in fields in Australia with a history of naturally occurring R. solani AG8. Due to the patchy nature of Rhizoctonia root rot in the field, a 2-phase split-plot field trial system was used to allow comparison for disease control efficacy in the same disease space. Seed applied strains were first assessed for their ability to reduce Rhizoctonia using ‘microplots’ which compare adjacent treated and untreated one metre rows. Up to 10% increases in plant growth and a 32% reduction in root disease was measured at eight weeks after sowing. Selected strains were then assessed in 20 m six row (3 + 3) split plots for their effects on early season wheat growth and root damage and for grain yield. A Paenibacillus and a Streptomyces strain were identified which were able to reduce root damage by 20% and 32% and increase grain yield by 4.2% and 2.8%, respectively, compared to untreated controls. The current best registered chemical control for Rhizoctonia root rot reduced root disease by 35% and increased yield by 3.0% in the same trial.
- Published
- 2019
6. Molecular characterization of interspecific competition of Diachasmimorpha longicaudata (Ashmead) and Fopius arisanus (Sonan) parasitizing the oriental fruit fly, Bactrocera dorsalis (Hendel)
- Author
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Guang Hong Liang, Scott M. Geib, Hao Yu Lin, Jun Xian Zheng, Wade P. Heller, Sheina B. Sim, Jian Hui Lin, Eric B. Jang, and Lie Qing Fu
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0106 biological sciences ,Larva ,Host (biology) ,fungi ,Biological pest control ,Zoology ,Parasitism ,Interspecific competition ,Biology ,biology.organism_classification ,010603 evolutionary biology ,01 natural sciences ,Bactrocera dorsalis ,Parasitoid ,Pupa ,010602 entomology ,Insect Science ,Agronomy and Crop Science - Abstract
Diachasmimorpha longicaudata (Ashmead) and Fopius arisanus (Sonan), are two of the most abundant and widely used parasitoids for biological control of Bactrocera dorsalis (Hendel) worldwide. However, interspecific competition between them frequently occurs within a single host once they coexit in same orchard, resulting in reduction of their combined impact. However, thus far, it is difficult to characterize these complex interactions. This paper demonstrates qPCR-methods for detection of parasitism for single D. longicaudata, and methods to determine interspecific interaction with F. arisanus. Utilizing qPCR-based methodologies, a species-specific probe was designed for D. longicaudata, which was coupled with a previously published probe for F. arisanus. An assay was developed that is sensitive enough to detect parasitism of solitary D. longicaudata across all developmental stages including one egg per host larva (0.01 ng/40 ng parasitoid/host DNA). The detected parasitism of D. longicaudata was higher than that of using traditional rearing-methods. For the lab-reared and wild strain of multiple species parasitization, qPCR-methods also detected higher parasitism by the above two species from one assay respectively when compared to conventional rearing-based methods. In the later experiment, the majority of D. longicaudata larvae were dying or dead within hollow-like host pupae probably due to interspecific competition. This method is a reliable and robust technique to determine parasitism by a single species or both species of parasitoid across all life stages within one host. It will be useful to evaluate parasitoid combined suppression, and to characterize complex interspecific competition between these two species of parasitoids.
- Published
- 2018
7. Global scientific progress and shortfalls in biological control of the fall armyworm Spodoptera frugiperda
- Author
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Wyckhuys, Kris A.G., Akutse, Komivi S., Amalin, Divina M., Araj, Salah-Eddin, Barrera, Gloria, Beltran, Marie Joy B., Ben Fekih, Ibtissem, Calatayud, Paul-André, Cicero, Lizette, Cokola, Marcellin C., Colmenarez, Yelitza C., Dessauvages, Kenza, Dubois, Thomas, Durocher-Granger, Léna, Espinel, Carlos, Fallet, Patrick, Fernández-Triana, José L., Francis, Frederic, Gómez, Juliana, Haddi, Khalid, Harrison, Rhett D., Haseeb, Muhammad, Iwanicki, Natasha S.A., Jaber, Lara R., Khamis, Fathiya M., Legaspi, Jesusa C., Lomeli-Flores, Refugio J., Lopes, Rogerio B., Lyu, Baoqian, Montoya-Lerma, James, Montecalvo, Melissa P., Polaszek, Andrew, Nguyen, Tung D., Nurkomar, Ihsan, O'Hara, James E., Perier, Jermaine D., Ramírez-Romero, Ricardo, Sánchez-García, Francisco J., Robinson-Baker, Ann M., Silveira, Luis C., Simeon, Larisner, Solter, Leellen F., Santos-Amaya, Oscar F., Talamas, Elijah J., de Souza Tavares, Wagner, Trabanino, Rogelio, Turlings, Ted C.J., Valicente, Fernando H., Vásquez, Carlos, Wang, Zhenying, Wengrat, Ana P.G.S., Zang, Lian-Sheng, Zhang, Wei, Zimba, Kennedy J., Wu, Kongming, Elkahky, Maged, and Hadi, Buyung A.R.
- Published
- 2024
- Full Text
- View/download PDF
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