Susceptibility of Crude and Semi-Purified Extracts of Nucleopolyhedrovirus Isolates of <I>Helicoverpa armigera</I> (Hubner) to Simulated Sunlight

Ali Mehrvar; R. J. Rabindra; K. Veenakumari; G. B. Narabenchi

doi:10.18311/jbc/2007/3895

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Authors

Ali Mehrvar
Department of Plant Protection, M. H. E. C, University of Tabriz, Tabriz, 516661647 ,IR
R. J. Rabindra
Project Directorate of Biological Control, P.B.No. 2491, H. A. Farm Post, Bellary Road, Hebbal, Bangalore 560024, Karnataka ,IN
K. Veenakumari
Project Directorate of Biological Control, P.B.No. 2491, H. A. Farm Post, Bellary Road, Hebbal, Bangalore 560024, Karnataka ,IN
G. B. Narabenchi
Pest Control (India) Pvt. Ltd. Division: Bio-Control Research Laboratories, Bangalore-560064 ,IN

DOI:

https://doi.org/10.18311/jbc/2007/3895

Keywords:

Geographic Isolates, Helicoverpa armigera, Nucleopolyhedrovirus, Persistence, Simulated Sunlight.

Abstract

The stability of both crude and semi-purified extracts of different HaNPV isolates under simulated sunlight was studied. It was realized that the persistence of both crude and semi-purified suspensions of Negamum isolate collected from Tamil Nadu was most tolerant to simulated sunlight among all the isolates tested in this study. The highest larval mortality (70.12%) was obtained from crude extract of the Negamum isolate as compared with that of semi-purified suspension (54.44%). The order of inhibition of crude viral extracts of HaNPV isolates under simulated sunlight irradiation at 500 W/m² for 90 minutes was Negamum < Ooty < Coimbatore < Mumbai < Hyderabad < Parbhani < Rahuri, which was similar with that of the semi-purified suspensions with the exception of Parbhani < Hyderabad.