Author(s):

J Nambi

Abstract: A field experiment was conducted at Experimental farm, Faculty of Agriculture, Annamalai University, Annamalai Nagar, to study the effect of integrated weed management practices in direct seeded puddle rice during <em>Navarai</em> (January to April 2015). The experiment was laid out in a randomized block design with ten treatments and three replications. The treatments comprised of T ₁ - Unweeded control, T₂- Hand weeding on 20 and 40 DAS, T₃– Pre emergence application of oxadiargyl@125g ha^-1 followed by hand weeding on 30 DAS, T₄- Pre emergence application of pendimethalin0.75 kg ha^-1followed by hand weeding on 30 DAS, T₅–Post emergence application of ethoxysulfuron@100g ha^-1on 20 DAS, T₆- Post emergence application of fenoxa prop-p-ethyl@60g ha^-1 on 20 DAS, T₇- Pre emergence application of oxadiargyl@125g ha^-1followed bypost emergence application of ethoxysulfuron @100g ha^-1on 20 DAS, T₈- Pre emergence application of pendimethalin@0.75kg ha^-1followed bypost emergence application of ethoxysulfuron @ 100 g ha^-1on 20 DAS, T₉- Pre emergence application of oxadiargyl@125g ha^-1followed bypost emergence application of fenoxa prop-p-ethyl @60 g ha^-1 on 20 DAS and T₁₀- Pre emergence application of pendimethalin @ 0.75 kg ha^-1followed bypost emergence application offenoxa prop-p-ethyl @ 60g ha^-1 on 20 DAS. Among the treatments, pre-emergence application of oxadiargyl @ 125g ha^-1 followed by one hand weeding on 30 DAS recorded the least weed count, weed biomass and the highest weed control index and higher growth and yield attributes of rice. This was followed by hand weeding on 15 and 30 DAS. Unweeded check recorded the highest weed density, weed biomass resulting in the least grain yield<em>.</em>

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