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以氙灯、高压汞灯和太阳光为光源,研究了苄嘧黄隆、乙草胺、氟乐灵、二甲四氯、草甘膦、甲黄隆、灭多威、甲基对硫磷、多菌灵等9种常用除草剂、杀虫剂、杀菌剂对除草剂丁草胺在水中的光解作用影响.结果表明：苄嘧黄隆等9种农药使丁草胺光解速度减缓，表现出显著的光猝灭降解效应，其中草甘膦、甲基对硫磷及乙草胺光猝灭效率较高；其光猝灭作用强度与甲基对硫磷和氟乐灵、草甘膦、苄嘧黄隆的剂量成正相关.“,”The photoquenching effects of bensulfuron-methyl,acetochlor, trifluralin,MCPA,glyphosate,methsulfuron-methyl,methomyl,parathion-methyl,carbendazim on the butachlor photolysis in water under xenon lamp, high pressure mercury lamp and sunlight irradiation were studied.The results showed: The photolysis rate of butachlor was slow down by these tested pesticides;the photoquenching efficiencies of glyphosate,parathion-methyl and acetochlor were higher than the others.The photoquenching efficiency was positively related to the dosage of parathion-methyl,trifluralin,glyphosate and bensulfuron-methyl.