Publication Type

Journal Article

Journal Name

Insect Science and its Application

Publication Date

1-1-2001

Abstract

Conidial suspensions of four isolates each of Bcauvcria bassiana and Melnrhizhtm anisopliae were evaluated in the laboratory for their virulence to adult Ootlicca mntabilis. All the isolates tested were pathogenic to the beetle, but to varying degrees. Three of them, B. bassiana CPD 3 and CPD10 and M. anisopliae CPD 6 were superior to all other isolates in terms of mortality induced on adult beetle, LT50 and LC50, with B. bnssiana CPD 3 having the lowest LC50 value. In feeding assayi consumption by beetles treated with B. bnssiana CPD 3 was significantly reduced within 2 days treatment (DAT) and the trend continued until 7 DAT, when all the beetles died. The antifeedant effects of the pathogen on O. imilnbilis could partly offset its slow speed of kill, and might play an important role in field control. © 2001 ICIPE.

Keywords

Beauvcria bassiana, Cowpea leaf beetle, Entomopathogen, Metarliizhiin anisopliae', Ootlieca mntabilis

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