Pest complex of Brinjal Crop (Solanum melongena L.): Pest Management with Botanical Insecticides Comparing Imidacloprid- 17.8 SL

The field experiments of the present investigation was conducted in the Instructional Farm, Faculty of Agriculture. The laboratory experiments were done in the Department of Agricultural Entomology and Department of Biochemistry of Uttar Banga Krishi Viswavidyalaya, Pundibari, Cooch Behar, West Bengal in two successive spring seasons. The experiment was conducted in randomized block design with 7 treatments and 3 replications, to evaluate the efficacy of some botanical products against certain sucking pest of brinjal. The treatments included Neem leaf extract, pongamia leaf extract, Accorus calamus, Tobacco, Imidacloprid, Multineem, Un treated control. Two spraying of each treatment were conducted starting 30 days after transplanting, at an interval of 15 days. Observation on population of sucking pests (aphids, whitefly and jassids) was recorded before treatment and 3, 7 and 10 days after each spraying. The results revealed that imidacloprid was significantly superior over all % reduction of sucking pest population over control followed by multineem, neem leaf extract, tobacco leaf extract and sweet flag leaf extract (35. Treatment with pongamia leaf extract was the least effective one as it caused the lowest reduction of population over control.