Integrated Weed Management in Aerobic Rice (Oryza sativa L.)

Abstract

Field experiment was conducted during Summer 2008 and kharif 2008 under aerobic condition at Agricultural Research Station, Kathalagere, Davangere, Southern transition zone of Karnataka. The study consisted of 8 treatments viz., Weedy check, Hand weeding at 20 and 40 DAS, Pyrazosulfuron @ 25 g a.i./ha at 5 DAS, Pyrazosulfuron @ 25 g a.i./ha at 5 DAS + T2, Butachlor @ 1.0 kg a.i./ha at 5 DAS, Butachlor @ 1.0 kg a.i./ha at 5 DAS + T2, Sunrice (Ethoxysulfuron) @ 20 g a.i./ha at 20 DAS and Sunrice (Ethoxysulfuron) @ 20 g a.i./ha at 20 DAS + Hand weeding at 40 DAS. The application of Pyrazosulfuron @ 25 g a..i./ha at 5 DAS and one hand weeding at 20 and 40 DAS recorded significantly higher grain yield (5082 and 4305 kg/ha in summer and kharif, respectively). The weedy check recorded significantly lower grain and straw yield (93 and 100 kg/ha, respectively) during summer. Infestation of weeds in kharif caused complete failure of crops.