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旱粮棉区棉田杂草主要靠人工防除和使用乙草胺、敌草胺、高效盖草能、草甘膦等有限的几种除草剂进行化学防除。由于上述除草剂对多年生恶性杂草防除效果不理想，有的（乌蔹莓）甚至无效，因此使多年生恶性杂草得以蔓延和危害加重。为了控制多年生恶性杂草的为害，我所于１９９
Dry cotton grain weed cotton field mainly rely on artificial control and the use of acetochlor, dithiocarbamide, Gaolinite can, glyphosate and other limited number of herbicides for chemical control. Because of the above herbicides on perennial vicious weed control effect is not ideal, and some (blackberry) even invalid, so that perennial vicious weeds can be spread and harmed. In order to control pests of perennial weeds, I’m at 199