COMPARATIVE EFFICACY OF DIFFERENT INSECTICIDES ON SUCKING AND CHEWING INSECT PESTS OF COTTON

Four insecticides when used alone or in combinations viz. Cypermathrin 10EC, Deltaphos 360EC (deltamathrin + triazophos), Deltaphos 360EC + Confidor 200SL (deltamathrin + triazophos + imidacloprid), Cypermathrin 10EC + Confidor 200SL (imidacloprid) were tested against sucking insect pests such as jassid, Amrasca biguttula biguttula Dist.; thrips, Thrips tabaci Genn.; whitefly, Bemisia tabaci Lind and spotted bollworm, Earias insulana Boisd. on cotton under field conditions. All insecticide whether alone or in combinations were applied at their recommended doses with the help of knapsack sprayer three times with an interval of a week. The results of the present study revealed that all insecticides or combinations were almost equally effective to control E. insulana. Deltaphos 360EC + Confidor 200SL combination was comparatively most effective against A. biguttula bigutulla, T. tabaci and E. insulana. None of the insecticides or combinations was found effective for the control of B. tabaci.