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Abstract
The instar-wise larval mortality in H. armigera due to HaNPV @ 0.500 ml/l showed a consistent decrease in all the five instars and cent per cent larval mortality was recorded in the first instar larvae. Early instar larvae were found to be the most susceptible as compared to later instar larvae. The cumulative (Larval + Pupal) mortality in all the instars ranged from 56.66 to 100.00% with an average of 78.66%.
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References
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- Hussain A., Singh S. 2014effective toxicity of NPV to second and fourth instar larvae ofhelicoverpa armigera(hubner) on tomato. Agriculture for SustainableDevelopment,2 (1): 1-5.
- Ma D.L., Gordh G., Zalucki M.P. 2000.Toxicity of biorational insecticides to Helicoverpa spp. (Lepidoptera :Noctuidae) and predators in cotton fieldInternational Journal of Pest Management, 46: 237-240.
- Mahesh K., Sharma M., Sharma P.K. 2012.In vitro evaluation of larval age and dose of virus-inoculum on mortality and NPV-yield from HelicoverpaarmigerahubnerInternational Journal of Microbial Resource Technology, 1 (1): 24-27.
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- Songdou Z., Fengming W., Zhen L., Xiaoxia L. 2015.Effects of Nucleopolyhedrovirus Infection on the Development of Helicoverpaarmigera (Lepidoptera: Noctuidae) and Expression of Its 20-Hydroxyecdysone—and Juvenile Hormone—Related Genes, Florida Entomologist, 98 (2): 682-689.
References
Bentham G., Hooker J.P. 1970. Genera platinum (Genera of plant), 1: 324.
Bindra O.S. 1968.Insect pests of pulse crops.India Farming, 17 (11): 12-14 and 56.
Hussain A., Singh S. 2014effective toxicity of NPV to second and fourth instar larvae ofhelicoverpa armigera(hubner) on tomato. Agriculture for SustainableDevelopment,2 (1): 1-5.
Ma D.L., Gordh G., Zalucki M.P. 2000.Toxicity of biorational insecticides to Helicoverpa spp. (Lepidoptera :Noctuidae) and predators in cotton fieldInternational Journal of Pest Management, 46: 237-240.
Mahesh K., Sharma M., Sharma P.K. 2012.In vitro evaluation of larval age and dose of virus-inoculum on mortality and NPV-yield from HelicoverpaarmigerahubnerInternational Journal of Microbial Resource Technology, 1 (1): 24-27.
Nachimuthu S.K., Murugan K., Zhang W. 2007,Additive interaction of HelicoverpaarmigeraNucleopolyhedrovirus and Azadirachtin. BioControl, 53: 869-880.
Pourmirza A.A. 2000. Relationship between Nuclear Polyhedrosis Virus Susceptibility and Larval Weight in Heliothisarmigera, Journal of Agricultural Science and Technology, 2: 291-298.
Songdou Z., Fengming W., Zhen L., Xiaoxia L. 2015.Effects of Nucleopolyhedrovirus Infection on the Development of Helicoverpaarmigera (Lepidoptera: Noctuidae) and Expression of Its 20-Hydroxyecdysone—and Juvenile Hormone—Related Genes, Florida Entomologist, 98 (2): 682-689.