At the Agricultural Research Station, Kovilpatti, in rainfed vertisols, experiments were conducted to findout the effect of integrated weed management practice for pre monsoon sown sorghum cowpea intercropping system during 1992-93 and 1993-94 in a randomised block design. Different herbicides and their time of applicaiton formed the treatments. (The results revealed that butachlor applied at 1.00 kg or 0.75 kg aiha immediately after the receipt of sowing rain followed by one hand weeding on 40 days after sowing (DAS) recorded lesser weed density and increased grain yields of base crop sorghum and intercrop cowpea. Application of butachlor at 0.75 kg ai/ha with one had weeding on 40 DAS registered highest net returns in both the years.
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