A field experiment was conducted at Sugarcane Research Station, Cuddalore, during 1989-1992 to find out the suitable herbicide for sugarcane intercropping system. Experimental results revealed that the preemergence application of thiobencarb 1.25 kg/ha gave the highest weed control efficiency (84.9% in black gram, 88.3% in soybean and 77.6% in groundnut) and it was on par with hand weeding practice. In all the intercrops, application of thiobencarb @ 1.25 kg/ha was found to be economical and gave better weed control efficiency. The results were comparable with that of two hand weedings. However, metribuzin @ 0.5 kg/ha proved phytotoxic to intercrops.
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