Comparative efficacy of some new insecticides against rice yellow stem borer, Scirpophaga incertulas Walker under field conditions

Abstract

A field experimental trial was conducted during two consecutive rabi seasons of 2014-15 and 2015-16 to evaluate comparative efficacy of some insecticides against rice yellow stem borer. The results clearly indicated that, yellow stem borer infestation after insecticidal application, i.e per cent dead heats varied from 1.8 -13.2 and white ears from 0.4 - 25.6 per cent over the rabi seasons. Chlorantraniliprole0.4 G @ 10 kg/hectare followed by chorantraniliprole 18.5 SC @ 150 ml/ hectare with average 1.9 and 2.5 per cent dead hearts and 0.7 and 1.0 per cent white ears damage respectively. Carbofuran 3G @ 25kg/hectare was the next best treatment in controlling the stem borer damage with 3.9 per cent dead heart and 4.5 white ear damage after insecticidal application. Regarding the yield chlorantraniliprole 0.4 G recorded higher average yield (69.63 q/ha) and all other insecticidal treatments showed significantly superior over untreated control (47.21 q/ha).