Influence of Host Plants on the Efficacy of Nucleopolyhedro Virus of elicoverpa Armigera (Hubner) (Lepidoptera: Noctuidae)

S. Ramakrishna; M.G.Venkatesha

Volume : III, Issue : VII, July - 2014

Influence of Host Plants on the Efficacy of Nucleopolyhedro Virus of elicoverpa Armigera (Hubner) (Lepidoptera: Noctuidae)

S. Ramakrishna, M. G. Venkatesha

Abstract :

The comparative efficacy of microbial pesticides on gram pod borer, Helicoverpa armigera and on the effect and dosage of HaNPV on the susceptibility of the borer was studied. Larvae were fed on different host plants treated with HaNPV of three different concentrations. Along with this midgut pH, foliage pH and protease enzyme activity was also observed. The bioassay results clearly correlated the susceptibility of H armigera larvae to both the change in midgut pH as well as protease in the midgut of the larvae on different host plants