Bio-efficacy of different insecticides against larval population density of gram pod borer, Helicoverpa armigera (Hub.) in chickpea

The bio-efficacy of HaNPV, Bacillus thuringiensis var. Kurstaki, NSKE, Endosulfan, Profenophos and Methomyl individually was evaluated in chickpea against Helicoverpa armigera (Hub.) during rabi season 2010- 11and 2011-12. The chickpea crop was sprayed three times (population count after 3, 7 and 14 days) with the respective insecticide when the pest population exceeded the economic threshold level (ETL). Among the different bio-pesticides and synthetic insecticides tested, HaNPV 400 LE/ha, Bacillus thuringeinsis var. Kurstaki 1.5 kg/ha, NSKE 5%, Endosulfan 0.07%, Profenophos 0.04% and Methomyl 0.08% alone where significantly superior over rest of the treatment in controlling of the larval population, reduction of pod damage. In the treatment against larval population of H. armigera give the superior result as the Endosulfan> Profenophos> Methomyl> HaNPV> Biobit> Bacillus thuringensis > NSKE during cropping season 2010-11 and 2011-12 on both the variety (Radhey and Awarodhi) and can be recommended the management of this insect pest in chickpea crop.