Abstract
Field studies were undertaken to assess the comparative efficacy of new insecticide rynaxypyr 0.4G and 18.5SC (chlorantraniliprole), and emamectin benzoate 5SG at different doses against rice leaf folder along with recommended insecticides like fipronil, carbofuran and profenophos on rice variety ‘Swarna’ (MTU-7029) during kharif, 2012 and summer, 2013 at Central Research Station Farm, Orissa University of Agriculture and Technology, Bhubaneswar. The granular formulation of rynaxypyr (0.4G) @ 50g a.i./ha was found to be the most effective in reducing the damage (80.27 and 86.12% reduction over control) with the highest grain yield (51q/ha and 55q/ha). With respect to damage reduction over control (77.03% and 84.98%) and grain yield (49q/ha and 53q/ha), the next best was rynaxypyr 0.4G @ 40g a.i./ha with second highest C: B ratio during kharif, 2012 (1: 5.80) and highest during summer, 2013 (1: 6.81). Rynaxypyr (18.5 SC) and emamectin benzoate (5 SG) were less effective. Recommended insecticides such as fipronil 0.3G, profenophos 50EC and carbofuran 3G recorded comparatively higher incidence, less field efficacy, with lower grain yield.
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