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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Authors

  • National Bureau of Agriculturally Important Insects, Post Bag No. 2491, H. A. Farm Post, Hebbal, Bellary Road, Bangalore 560024, Karnataka ,IN
  • Shrimathi Indira Gandhi College, Tiruchirappalli 620002, Tamil Nadu ,IN
  • Department of M.C.A., Shrimathi Indira Gandhi College, Tiruchirappalli 620002, Tamil Nadu ,IN
  • Indian Institute of Horticultural Research, Hessaraghatta Lake Post, Bangalore 560089, Karnataka ,IN
  • Department of Entomology, Agricultural Research Station, Raichur 584101, Karnataka ,IN

DOI:

https://doi.org/10.18311/jbc/2010/3565

Keywords:

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.

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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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Section

Research Articles