Bio-Efficacy of Heterorhahditis indica Poinar in Combination with Helicoverpa armigera Polyhedrosis Virus against Helicoverpa arnligera (Hubner)

A. Prabhuraj; B. V. Patil; Shivaleela; K. S. Girish

doi:10.18311/jbc/2004/4087

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Authors

A. Prabhuraj
Department of Entomology, College of Agriculture, University of Agricultural Sciences, Raichur 584 101, Karnataka ,IN
B. V. Patil
Department of Entomology, College of Agriculture, University of Agricultural Sciences, Raichur 584 101, Karnataka ,IN
Shivaleela
Department of Entomology, College of Agriculture, University of Agricultural Sciences, Raichur 584 101, Karnataka ,IN
K. S. Girish
Department of Entomology, College of Agriculture, University of Agricultural Sciences, Raichur 584 101, Karnataka ,IN

DOI:

https://doi.org/10.18311/jbc/2004/4087

Keywords:

Entomopathogenic Nematode, HaNPV, Helicoverpa armigera, Heterorhabditis indica, Infective Juvenile.

Abstract

The bio-efficacy of Heterorhabditis indica Poinar in combination with Helicoverpa armigera nuclear polyhedrosis virus (HaNPV) against Helicoverpa armigera (Hiibner) was evaluated during 2002 in the laboratory. Results revealed thut combination of H. indica and HaNPV at all concentrations recorded highest mortality (100%) and were on par with alone inoculation of H. indica treatment, but significantly superior over HaNPV alone against third instar larva. Fourth instar larva suffered cent per cent mortality when inoculated with H. indica plus HaNPV at all concentrations after 48 h compared to H. indica alone (@ 200 Usl larva) which recorded 75 per cent mortality. The results indicate the synergistic effect when both the bioagents were combined against fourth instar larva.