Evaluation of Chemical Insecticides and Neem Oil Against Shoot and Fruit Borer, Leucinodes Orbonalis (Guenee) in Brinjal

Abstract

An investigation was carried out to study the "Evaluation of chemical insecticides and neem. oil against shoot and · fruit borer, Leu?inodes orbona/is (Guenee) in brinjal" during kharif, 2012 at Crop Research Centre, Sardar Vallabhbhai Patel University of Agriculture and Technology, Meerut. The experiment comprised of nine treatments and laid out in randomized block design with three replications. During the crop season, seven insect pest species were found attacking the crop at different growth stages. Among them, brinjal shoot and fruit borer, L. orbonalis Guenee (August end to December end) was recorded as major pest. bihar hairy caterpillar, Spilosoma obliqua (July end to mid November), cotton. aphid, Aphis gossypii G. (August to mid November) and white fly, Bemisia tabaci Gennadius (July end to mid November) were found moderately damaging the crop. The leaf roller, Eublemma olivacae W. (August to mid November), leaf webber, Psara bipunctalis F. (August end to mid November) and grass hopper, Chrotogonus sp. (July end to December end) recorded on the crop were of less importance. Efficacy of d.ifferent insecticides revealed that all the treatment~ proved better than control at all time intervals after each sprays. Chlorantraniliprole 18.5 SC @ 150 ml/ha was found most effective in reducing the infestation of L. orbonalis which was closely followed by lambdacyhalothrin 5 EC @ 1 000 ml/ha, fipronil 5 EC @ 1000 ml/ha, bifenthrin 10 EC @ 1000 ml/ha and carbaryl 50 SP@ 1000 g/ha. The highest yield (268.50 q/ha) was obtained in plot treated with chlorantraniliprole 18.5 SC @ 150 ml/ha. However, higher cost benefit ratio (1 :5.55) was recorded from chlorantraniliprole 18.5 SC @ 150 ml/ha.