Abstract

                                Combination of two chemicals with different mode of action is the new strategy to reduce development of resistance among insects. Ready mix formulation of newer insecticide molecules flubendiamide + thiacloprid 480 SC was tested in different concentrations for the management of bollworms and sucking pests of cotton under field condition during 2006 - 08. Flubendiamide + thiacloprid 480 SC @ 120 g a.i ha-1 showed significantly lower bollworm damage and increased control of population of bollworms, aphids, whitefly and leaf hopper compared to standard checks spinosad 45 SC + imidacloprid 200 SL @ 90 +30 g a.i. ha-1 and indoxacarb 14.5 SC + imidacloprid 200 SL @ 75+30 g a.i. ha-1. Cotton plants sprayed with flubendiamide + thiacloprid 480 SC each at 120, 240 and 480 g a.i.ha-1 doses did not show any phytotoxic symptoms like epinasty, hyponasty, leaf injury, wilting, vein clearing and necrosis.

Key words : Cotton, thiacloprid, flubendiamide, bioefficacy, phytotoxicity