Impact of granular formulation of conventional and newer insecticides against brown planthopper Nilaparvata lugens in rice crop

Abstract

An experiment was conducted on hybrid rice variety PHB 71 to study field efficacy of granular formulation of fipronil and conventional insecticides viz., carbofuran and cartap hydrochloride against brown planthopper in rice crop at Banaras Hindu University research farm, Varanasi. The trials were laid in RBD with seven treatments including control, replicated thrice. The overall performance of various granular insecticidal treatments were assessed based on per cent increase in grain yield over control. Plots treated with Fipronil 0.6% GR @ 60g a.i./ha was the most effective and significantly superior over all other treatments in reducing the hopper infestation (2.0/hill) as compared to untreated control (13.7/hill) and realizing 60.0 per cent increase in grain yield over control. Fipronil 0.3% GR @ 60g a.i./ha stood second in order of effectiveness which recorded 58.27 percent. Cartap Hydrochloride 4% GR @ 750g a.i./ha proved least effective in which 28.86 per cent increase in yield was observed. © 2014, Plant Archives. All rights reserved.