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1. Spontaneous parthenogenesis in the parasitoid wasp Cotesia typhae: low frequency anomaly or evolving process?

Author

Capdevielle Dulac, Claire, Benoist, Romain, Paquet, Sarah, Calatayud, Paul-André, Obonyo, Julius, Kaiser, Laure, and Mougel, Florence

Subjects
Archaeology, CC1-960, Science
Abstract

Hymenopterans are haplodiploids and unlike most other Arthropods they do not possess sexual chromosomes. Sex determination typically happens via the ploidy of individuals: haploids become males and diploids become females. Arrhenotoky is believed to be the ancestral reproduction mode in Hymenopterans, with haploid males produced parthenogenetically, and diploid females produced sexually. However, a number of transitions towards thelytoky (diploid females produced parthenogenetically) have appeared in Hymenopterans, and in most cases populations or species are either totally arrhenotokous or totally thelytokous. Here we present the case of Cotesia typhae (Fernandez-Triana), a Braconidae that produces parthenogenetic females at a low frequency. The phenotyping of two laboratory strains and one natural population showed that this frequency is variable, and that this rare thelytokous phenomenon also happens in the wild. Moreover, mated females from one of the laboratory strains produce a few parthenogenetic daughters among a majority of sexual daughters. The analysis of daughters of heterozygous virgin females allowed us to show that a mechanism similar to automixis with central fusion is very likely at play in C. typhae. This mechanism allows some parts of the genome to remain heterozygous, especially at the chromosomes’ centromeres, which can be advantageous depending on the sex determination system involved. Lastly, in most species, the origin of thelytoky is either bacterial or genetic, and an antibiotic treatment as well as PCR experiments did not demonstrate a bacterial cause in C. typhae. The unusual case of low parthenogenetic frequency described in this species constitutes another example of the fascinating diversity of sex determination systems in Arthropods.

Published
2022
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3. Functional structure of the natural enemy community of the fall armyworm, Spodoptera frugiperda in the Americas

Author

Wyckhuys, Kris A.G., Akutse, Komivi S., Amalin, Divina M., Araj, Salah-Eddin, Barrera, Gloria, Joy B. Beltran, Marie, Ben Fekih, Ibtissem, Calatayud, Paul-André, Cicero, Lizette, Cokola, Marcellin C., Colmenarez, Yelitza C., Dessauvages, Kenza, Dubois, Thomas, Durocher-Granger, Léna, Espinel, Carlos, 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, Nguyen, Tung D., Nurkomar, Ihsan, Perier, Jermaine D., Pozsgai, Gabor, Ramírez-Romero, Ricardo, Robinson-Baker, Annmarie S., Sanchez-Garcia, Francisco J., Silveira, Luis C., Simeon, Larisner, Solter, Leellen F., Santos-Amaya, Oscar F., de Souza Tavares, Wagner, Trabanino, Rogelio, Vásquez, Carlos, Wang, Zhenying, Wengrat, Ana P.G.S., Zang, Lian-Sheng, Zhang, Wei, Zimba, Kennedy J., Wu, Kongming, and Elkahky, Maged

Published
2024
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5. Global scientific progress and shortfalls in biological control of the fall armyworm Spodoptera frugiperda

Author

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
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6. Managing and monitoring genetic isolation and local adaptation of endemic and introduced Cotesia sesamiae for the biological control of the cereal stemborer Busseola fusca in Cameroon

Author

Ndemah, Rose, Le Ru, Bruno Pierre, Capdevielle-Dulac, Claire, Schulthess, Fritz, Kaiser, Laure, Hanna, Rachid, Depoilly, Alexandre, Obonyo, Julius, Calatayud, Paul-André, Abang, Albert, and Dupas, Stéphane

Subjects
Biological Sciences, Genetics, Cotesia sesamiae, Biological control, Polydnavirus, Wolbachia, Genetic, Zoology, Entomology
Abstract

The success of biological bontrol (BC) introductions can be enhanced by considering theory and knowledge of biological systems. The gregarious braconid parasitoid Cotesia sesamiae (Cameroon) is one of the best studied biological control agent from the perspective of molecular ecology. Its evolutionary adaptation to the target host involves symbiotic partners. Polydnaviruses are responsible for immune and developmental adaptations whereas Wolbachia bacteria may reinforce this local adaptation though genetic isolation mechanisms. The noctuid Busseola fusca is a major stemborer pest of maize in sub-Saharan Africa. In contrast to eastern Africa, C. sesamiae is rarely found on B. fusca in western Africa. It is however often obtained from other stemborer species feeding on wild grasses. A biological control project was launched in 2006–2007 by introducing to Cameroon seven crosses of Kenyan populations of C. sesamiae collected in different ecozones. They included populations adapted to B. fusca that develop on maize as well as populations adapted to other hosts feeding on wild plants to allow carryover between cropping seasons. Wolbachia strains responsible for cytoplasmic reproductive incompatibilities with endemic strains were included in the crosses to limit genetic exchanges between introduced and endemic C. sesamiae and preserve genetic adaptation to B. fusca of the introduced populations, while at the same time preserving their ability to survive on wild plants. Six post release surveys were carried out on maize from 2007 to 2013, and on wild grasses in 2013. A total of 393 C. sesamiae individuals, each from one cocoon mass, were genotyped for 11 microsatellite loci. Multidimensional scaling analysis, STRUCTURE and GENECLASS analyses assigned almost all the parasitoids recovered from maize to those introduced from Kenya. The introduced strains were also recovered from wild host plants with little genetic exchanges with endemics. Each population remained strongly associated with its original Wolbachia component, suggesting that Wolbachia may contribute to genetic isolation between endemics and introduced populations in wild host plants when maize is absent, thereby conciliating biological control success and safety.

Published
2021

19. Invasiveness, biology, ecology, and management of the fall armyworm, Spodoptera frugiperda

Author

Kenis, Marc, primary, Benelli, Giovanni, additional, Biondi, Antonio, additional, Calatayud, Paul-André, additional, Day, Roger, additional, Desneux, Nicolas, additional, Harrison, Rhett D, additional, Kriticos, Darren, additional, Rwomushana, Ivan, additional, van den Berg, Johnnie, additional, Verheggen, François, additional, Zhang, Yong-Jun, additional, Agboyi, Lakpo Koku, additional, Ahissou, Régis Besmer, additional, Ba, Malick N, additional, and Wu, Kongming, additional

Published
2023
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25. Invasiveness, biology, ecology, and management of the fall armyworm, Spodoptera frugiperda

Author

Kenis, Marc, Benelli, Giovanni, Biondi, Antonio, Calatayud, Paul-André, Day, Roger, Desneux, Nicolas, Harrison, Rhett, Kriticos, Darren, Rwomushana, Ivan, van den Berg, Johnnie, Verheggen, François, Zhang, Yong-Jun, Agboyi, Lakpo Koku, Ahissou, Régis Besmer, Ba, Malick, Bernal, Julio, Nègre, Nicolas, CABI DELEMONT CHE, Partenaires IRSTEA, Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA), University of Pisa - Università di Pisa, University of Catania [Italy], Evolution, génomes, comportement et écologie (EGCE), Institut de Recherche pour le Développement (IRD)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Centre for Agricultural and Biosciences International (CABI), Institut Sophia Agrobiotech (ISA), Université Nice Sophia Antipolis (1965 - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Université Côte d'Azur (UCA), Center for International Forestry Research (CIFOR), Consultative Group on International Agricultural Research [CGIAR] (CGIAR), CSIRO Entomology, Commonwealth Scientific and Industrial Research Organisation [Canberra] (CSIRO), North-West University [South Aftrica] (NWU), Université de Liège, Chinese Academy of Agricultural Sciences (CAAS), cabi, Université Polytechnique Nazi Boni Bobo-Dioulasso (UNB), International Crops Research Institute for the Semi-Arid Tropics [Niger] (ICRISAT), International Crops Research Institute for the Semi-Arid Tropics [Inde] (ICRISAT), Consultative Group on International Agricultural Research [CGIAR] (CGIAR)-Consultative Group on International Agricultural Research [CGIAR] (CGIAR), Université du Texas, Diversité, Génomes & Interactions Microorganismes - Insectes [Montpellier] (DGIMI), Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Université de Montpellier (UM), Foreign, Commonwealth and Development Office (FCDO) , UK, Netherlands Government, European Commission Directorate-General for International Cooperation and Development (DEVCO), Swiss Agency for Development and Cooperation (SDC) through the Plantwise+ programme, and Ministry of Agriculture, Czech Republic MZE-RO0418

Subjects
biopesticides, integrated pest management, Insect Science, Noctuidae, [SDV]Life Sciences [q-bio], genomics, biological control, globalization, invasive species
Abstract

Early access; International audience; The fall armyworm (FAW), Spodoptera frugiperda (JE Smith, 1797), is a serious pest of several crops, particularly maize and other cereals. It has long been known as a pest in the Americas and has invaded most of Africa and parts of the Middle East, Asia, and Australia in the last six years. Its new status as an invasive species causing serious damage in many regions worldwide has highlighted the need for better understanding and has generated much research. In this article, we provide a comprehensive review of FAW covering its (i) taxonomy, biology, ecology, genomics, and microbiome, (ii) worldwide status and geographic spread, (iii) potential for geographic expansion and quarantine measures in place, and (iv) management including monitoring, sampling, forecasting, biological control, biopesticides, agroecological strategies, chemical control, insecticide resistance, effects of insecticides on natural enemies, as well as conventional and transgenic resistant cultivars. We conclude with recommendations for research to enhance the sustainable management of FAW in invaded regions.

Published
2022

27. Preface

Author

Sauvion, Nicolas, primary, Thiéry, Denis, additional, and Calatayud, Paul-André, additional

Published
2017
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29. Competitive Plant-Mediated and Intraguild Predation Interactions of the Invasive Spodoptera frugiperda and Resident Stemborers Busseola fusca and Chilo partellus in Maize Cropping Systems in Kenya

Author

Mutua, Johnstone Mutiso, primary, Mutyambai, Daniel Munyao, additional, Asudi, George Ochieng’, additional, Khamis, Fathiya, additional, Niassy, Saliou, additional, Jalloh, Abdul A., additional, Salifu, Daisy, additional, Magara, Henlay J. O., additional, Calatayud, Paul-André, additional, and Subramanian, Sevgan, additional

Published
2022
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36. Cannibalism and intraguild predation involved in the intra- and inter-specific interactions of the invasive fall armyworm, Spodoptera frugiperda (Lepidoptera: Noctuidae) and lepidopteran maize stemborers

Author

Sokame, Bonoukpoe Mawuko, primary, Sokame, Bonoukpoè Mawuko, additional, Musyoka, Boaz, additional, Mohammed, Samira A., additional, Tamiru, Amanuel, additional, Bruce, Anani, additional, Anderson, Peter, additional, Karlsson, Green K., additional, and Calatayud, Paul-André, additional

Published
2022
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39. Genome-Wide Patterns of Bracovirus Chromosomal Integration into Multiple Host Tissues during Parasitism

Author

Muller, Héloïse, primary, Chebbi, Mohamed Amine, additional, Bouzar, Clémence, additional, Périquet, George, additional, Fortuna, Taiadjana, additional, Calatayud, Paul-André, additional, Le Ru, Bruno, additional, Obonyo, Julius, additional, Kaiser, Laure, additional, Drezen, Jean-Michel, additional, Huguet, Elisabeth, additional, and Gilbert, Clément, additional

Published
2021
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44. Impact of an Exotic Invasive Pest, Spodoptera frugiperda (Lepidoptera: Noctuidae), on Resident Communities of Pest and Natural Enemies in Maize Fields in Kenya

Author

Sokame, Bonoukpoè Mawuko, primary, Musyoka, Boaz, additional, Obonyo, Julius, additional, Rebaudo, François, additional, Abdel-Rahman, Elfatih M., additional, Subramanian, Sevgan, additional, Kilalo, Dora Chao, additional, Juma, Gérald, additional, and Calatayud, Paul-André, additional

Published
2021
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45. Managing and monitoring genetic isolation and local adaptation of endemic and introduced Cotesia sesamiae for the biological control of the cereal stemborer Busseola fusca in Cameroon

Author

Ndemah, Rose, primary, Le Ru, Bruno Pierre, additional, Capdevielle-Dulac, Claire, additional, Schulthess, Fritz, additional, Kaiser, Laure, additional, Hanna, Rachid, additional, Depoilly, Alexandre, additional, Obonyo, Julius, additional, Calatayud, Paul-André, additional, Abang, Albert, additional, and Dupas, Stéphane, additional

Published
2021
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46. Larval dispersal of the invasive fall armyworm, Spodoptera frugiperda, the exotic stemborer Chilo partellus, and indigenous maize stemborers in Africa

Author

Sokame, B. M., Subramanian, S., Kilalo, D. C., Juma, G., and Calatayud, Paul-André

Subjects
Lepidoptera, Busseola fusca, crawling activity, Noctuidae, fungi, ballooning activity, food and beverages, Sesamia calamistis, Crambidae
Abstract

Larval dispersal either through ballooning or crawling results in a redistribution of the insect population and infestations within and between plants. In addition, invasive species, such as the fall armyworm (FAW), Spodoptera frugiperda (JE Smith) (Lepidoptera: Noctuidae), and the exotic stemborer Chilo partellus (Swinhoe) (Lepidoptera: Crambidae), may displace indigenous stemborers on maize in Africa. To test whether larval dispersal activity may play a role in the displacement of indigenous stemborers, larval dispersal was compared between FAW, C. partellus, and the indigenous species Busseola fusca (Fuller) and Sesamia calamistis (Hampson) (both Lepidoptera: Noctuidae). Twenty potted maize plants were infested with one batch of eggs either from stemborers (B. fusca, S. calamistis, or C. partellus) or from FAW and monitored in the greenhouse for ballooning activities. After egg hatching, both ballooning and non-ballooning larvae were identified according to species and counted. FAW neonate larvae had greater potential for ballooning off than stemborers, irrespective of species. For each species, more females dispersed than males, and their survival rate was higher than that of non-ballooning larvae. In addition, plant-to-plant larval movements were studied using 6.25-m(2) plots of caged maize in a completely randomized design with five replicates. FAW was found to have wider dispersal and plant damage potential than any of the stemborer species. In conclusion, in contrast to C. partellus, the invasive characteristic of FAW can be explained, in part, by its higher larval dispersal activity compared to stemborers. This difference in larval dispersal might also be considered in sampling plans for monitoring pest density in the field.

Published
2020

47. Impact of the exotic fall armyworm on larval parasitoids associated with the lepidopteran maize stemborers in Kenya

Author

Sokame, B. M., Obonyo, J., Sammy, E. M., Mohamed, S. A., Subramania, S., Kilalo, D. C., Juma, G., and Calatayud, Paul-André

Subjects
nonagrioides, Busseola fusca, Cotesia typhae, Chilo partellus, Biological control, Non-reproductive host mortality, Sesamia calamistis, Cotesia flavipes, Cotesia sesamiae, Sesamia
Abstract

Exotic invasive insect herbivores have the potential to interfere with existing herbivore-natural enemy interactions in new environments. Fall armyworm (FAW), Spodoptera frugiperda J.E. Smith (Lepidoptera: Noctuidae), is a new invasive pest in maize fields in Africa. Understanding the acceptability and suitability of FAW to existing maize stemborer-parasitoid interactions is the first step in elucidating the impact that this exotic insect pest can have on the existing natural enemies used in biological control of maize stemborers in Kenya. The most commonly used larval parasitoids for biological control programs against maize stemborer communities in East Africa are Cotesia flavipes Cameron (Hymenoptera: Braconidae) and two populations of the native Cotesia sesamiae (Cs-Inland and Cs-Coast) Cameron (Hymenoptera: Braconidae). All these parasitoid species attacked FAW larvae but none yielded offspring, although they induced high non-reproductive host mortality when compared to natural mortality. Furthermore, the parasitoids that inserted their ovipositor into FAW larvae exhibited no significant preference between FAW larvae and their respective stemborer hosts under dual-choice bioassays. In olfactometer bioassays, the parasitoids were more attracted to plants infested by FAW than uninfested plants and even showed a marked preference for the odours of plants infested by FAW over those of plants infested by their natural host counterparts. This study illustrates that exotic pests, such as FAW, can impact existing stemborer-parasitoid interactions associated with maize, even if they cannot be used as hosts by parasitoids associated with these stemborers. Although additional studies are needed, FAW might therefore have a negative impact on stemborer biological control existing before its invasion.

Published
2020

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