Efficacy of insecticides against major defoliators of rice

A field experiment carried out at the College of Agriculture, V C Farm, Mandya, Karnataka evaluated the efficacy of insecticides viz., indoxacarb 15.8EC @ 0.5 ml/l, flubendiamide 48SC @ 0.15 ml/l, chlorantraniliprole 18.5SC @ 0.12 ml/l, benfuracarb 3G @ 33 kg/ha, cartap hydrochloride 4G @ 25 kg/ha, fipronil 0.3G @ 25 kg/ha, acephate 75SP @ 1g/l and chlorpyriphos 20EC @ 2ml/l against major defoliators of rice viz., rice hispa, leaf folder, caseworm and horned caterpillar during kharif, 2018. The reduction of leaf damage over untreated control after imposing treatments was maximum with flubendiamide 48SC (56.99-82.72%) followed by cartap hydrochloride 4 G (52.24- 79.69%). Also, flubendiamide 48SC @0.15 ml/l was the most effective with maximum cost benefit ratio.