Efficacy of Bio-Pesticides in the Management of Helicoverpa armigera (Hüb.) in Chick pea

Studies were undertaken to know the efficacy of nuclear polyhederosis virus, Ha NPV-250 LE/ha, Ha NPV-350 LF/ha, Ha NPV-450 LE/ha, Bacillus thuringiensis, Bt (biolep) 1%, neem seed kernel extract-NSKE 5% and endosulfan 0.07% against Helicoverpa armigera in chick pea cv. K-850. Spraying was started when the larval population was above economic threshold level (3 larvae/m2) and second after 10 days interval. Larval population was counted before the spraying and post treatment data was recorded on 3, 7, 10th day. Maximum larval mortality was recorded in endosulfan 0.07% (85%) followed by Bt formulation 1% (80%) and Ha NPV-450 LE/ha (75%), respectively while NSKE-5% was least effective. Highest yield was obtained in endosulfan 0.07% (25 q/ha) followed by Ha NPV-450 LE/ha (23.66 q/ha) and Bt 1% (24 q/ha).