Browsing by Subject "Pathogenicity bioassay"

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    In-vitro pathogenicity of Akanthomyces lecanii andMetarhizium anisopliae against the aphid Aphis craccivora
    (Universidad de Murcia. Servicio de publicaciones, 2023) Isma’il, Safiya; Ali Deba, Fatima; Auwal Ladan, Muhammad; Nuru Yakubu, Mohammed; Sa’id Haruna, Usman; Usman Aliyu, Habiba; Abdulhameed, Ahmad; Tahir, Fatima
    Aphis craccivora is a serious pest of cowpea worldwide and re-sponsible for low crop yields. Entomopathogenic fungi offer envir-onmentally friendly alternatives to conventional synthetic pesti-cides. In the present study, the biological control potential ofAkanthomyces lecanii and Metarhizium anisopliae against cowpeaaphid was evaluated under laboratory conditions. These fungi wereused in the laboratory bioassays: Conidial suspensions with differ-ent concentrations of spores of each isolate were sprayed on filter-paper discs on which bean leaves were placed as food for the in-sects. Aphid mortality was observed and recorded for 10 days. Theconcentration of 1x108 conidia/ml was high enough to cause insectmortality in all the isolates tested while the control mortality was10%. This study confirms the potential of using the indigenousfungi as biological control agents against the cowpea aphids evenat low concentrations.