Field Evaluation of Insecticides against Bollworms in Cotton

All the insecticidal treatments significantly reduced the incidence of bollworms on square, green boll and open boll basis and increased seed cotton yield over untreated control. Emamectin benzoate 5 SG @ 11 g a.i./ha proved most effective treatment, both as protection and production wise by recording lowest infestation of bolworms on square basis (10.1 & 9.2%), green bolll basis (8.2 & 7.4%) and open boll basis (4.5 & 4.6%) and had the highest seed cotton yield (1565 & 1645 kg/ha) followed by spinosad 45 SC @ 75 g a.i./ha and indoxacarb 14.5 SC @ 75 g a.i./ha without significant margins.