Biology and Ecofriendly Management of Heljcoverpa Armjgera (Hubner) on Chickpea in Meerut Region

Abstract

Present studies entitled "Biology and ecofriendly management of Helicoverpa armigera (Hubner) on chickpea in Meerut region" The experiment was conducted in randomized block design with three replications of seven treatments for years i.e. Rabi }51 seasons of2014-20I5 at Bio-control Laboratory, Sardar Vallabhbhai Patel University of Agriculture and Technology, Meerut-250 II 0 (U.P.).In extensive study, some species of insects were observed to be associated with the chickpea. Among them, Helicoverpa armigera (Hubner) was found as major insect-pest of chickpea with severe damage and high economic status. The data for population fluctuation of Helicoverpa armigera was recorded from 49th metrological week (SW) to 14th metrological week (SW) on randomly selected IO plants the first appearance of Helicoverpa armigera was in 52"d metrological week (SW) on chickpea crop and overall population kept on increasing until it reach 5 Jarvae/10 plants during the season. Whereas maximum population was observed 21 larvae/plant in 5th metrological week (SW). Among all the treatments The minimum pod infestation was recorded with spinosad 45% sc 2 @ ml/lit treatment which was significantly superior from the rest of the treatment and was statistically at par with HaNPV 2x I 0 pod/ml @ 250-500 litlha, Bacillus thuringiensis 0.1% @ 1.5 grn/lit were recorded. In following the pod infestation was found with neem oil 1500 ppm @ 2 mlllit, Beauveria bassi ana 2x I 0 cfu/gm @ 2grn/lit Metarhizum anisoplae 2x I 0 cfu/gm @ 2grn/lit, respectively all the treatments were statistically superior to the untreated control in minimizing the pod infestation caused by H armigera larvae. The maximum grain yield of I5.95 qlha was recorded with spinosad 45SC @ 2mi/Jit. Among the bio pesticides treatments, HaNPV @ 250-SOOLE/ha was recorded with highest grain yield as 1I.I2 qlha. This was followed by Bacillus thuringiensis var. Kurstaki @1.5 grn/lit., Neem oil@ 2mVIit. and Beauveria bassiana@ 2 grn/lit.with grain yield of 1 0.85, I 0.53, and 10.10 q/ha, respectively. The lowest gain yield of 9.98 was obtained from Metarhizium anisopliae @ 2 grn/lit. The lowest grain yield of 6.40 q/ha was recorded with untreated control.