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Direct and Indirect Infection Effects of Four Potent Fungal Isolates on the Survival and Performance of Fall Armyworm Larval Parasitoid Cotesia icipe

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dc.contributor.author Junitor, Chepkemoi
dc.contributor.author Ken, Okwae Fening
dc.contributor.author Felicitas, Chaba Ambele
dc.contributor.author Joseph, Munywoki
dc.contributor.author Komivi, Senyo Akutse
dc.date.accessioned 2023-04-11T07:47:30Z
dc.date.available 2023-04-11T07:47:30Z
dc.date.issued 2023
dc.identifier.uri https://doi.org/10.3390/su15043250
dc.description PUBLICATION en_US
dc.description.abstract Fall armyworm (FAW), Spodoptera frugiperda, has recently invaded Africa where it is seriously threatening food security. Current management methods rely heavily on synthetic insecticides which are harmful to humans, the environment, and non-target beneficial insects. Cotesia icipe was recently identified as a major FAW-associated indigenous parasitoid causing a high parasitism rate on the pest in Kenya. Previous studies have demonstrated the efficacy of Metarhizium anisopliae ICIPE 7, ICIPE 41, ICIPE 78, and Beauveria bassiana ICIPE 621 against FAW. However, limited information is available on the interactions between these potent isolates and C. icipe. This study therefore assessed direct and indirect infection effects of these fungal isolates on C. icipe, induced 2nd instar FAW mortality, and parasitism rates of the infected C. icipe. Results showed that when C. icipe were directly exposed to dry conidia of the fungal isolates, ICIPE 7 and ICIPE 41 caused the highest (100%) C. icipe adult mortality seven days post-exposure. Both isolates also induced the highest FAW larval mortality of 55% and 53%, respectively. ICIPE 78 recorded the highest parasitism rates after direct infection. In the indirect exposure (fungal-infected FAW larvae exposed to the parasitoid), 1 × 109 conidia mL−1 recorded high C. icipe adult and FAW 2nd instar mortalities for all fungal isolates. This study provides an important baseline for effective fungal-based biopesticides development that could also be used in augmentative biological control. However, further studies en_US
dc.description.sponsorship UK’s Foreign, Commonwealth and Development Office (FCDO) European Union (EU) International Centre of Insect Physiology and Ecology (icipe). en_US
dc.publisher MDPI-Sustainability en_US
dc.rights Attribution-NonCommercial-ShareAlike 3.0 United States *
dc.rights.uri http://creativecommons.org/licenses/by-nc-sa/3.0/us/ *
dc.subject Beauveria bassiana en_US
dc.subject biological control en_US
dc.subject biopesticides en_US
dc.subject Cotesia icipe en_US
dc.subject Metarhizium anisopliae en_US
dc.subject parasitism rate en_US
dc.subject Spodoptera frugiperda en_US
dc.title Direct and Indirect Infection Effects of Four Potent Fungal Isolates on the Survival and Performance of Fall Armyworm Larval Parasitoid Cotesia icipe en_US
dc.type Article en_US


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