Seasonal Population Fluctuations of Cotton Bollworm, Helicoverpa armigera (Hubner) in Relation to Biotic and Abiotic Environmental Factors at Raichur, Karnataka, India
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DOI:
https://doi.org/10.18311/jbc/2010/3565Keywords:
Helicoverpa armigera, Cotton, Season, Spiders, Chrysopids.Abstract
An attempt was made to study the effect of abiotic and naturally occurring biotic factors on Helicoverpa armigera (Hubner) (Lepidoptera: Noctuidae) with cotton as a model crop system. The results revealed that Chrysoperla sp. (carnea-group) (r = 0.344) was positively correlated with pest incidence and the weather parameters like maximum temperature (r = -0.309) and rainfall (r = -0.288) were negatively correlated with pest incidence. It was observed that post-monsoon season was most favourable for pest occurrence and it was more when the crop was in flowering and boll formation stage. Spiders and Chrysoperla sp. (carnea-group) were positively correlated with pest incidence during winter.Downloads
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Published
2010-03-15
How to Cite
Pratheepa, M., Meena, K., Subramaniam, K. R., Venugopalan, R., & Bheemanna, H. (2010). Seasonal Population Fluctuations of Cotton Bollworm, <I>Helicoverpa armigera</I> (Hubner) in Relation to Biotic and Abiotic Environmental Factors at Raichur, Karnataka, India. Journal of Biological Control, 24(1), 47–50. https://doi.org/10.18311/jbc/2010/3565
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Research Articles