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田间试验结果表明,保护性耕作条件下苗后除草剂在玉米3~5叶期、杂草2—4叶期施用4%烟嘧磺隆悬浮剂75和100mL/667m^2,药后45d总株防效分别为86.31%和93.50%,总鲜重防效为87.87%和94.72%,除草活性高于莠去津,尤其对禾本科杂草的鲜重防效均在91.38%以上。4%烟嘧磺隆50mL/667m^2+38%莠去津80mL/667m^2混用后,对双子叶杂草除草效果有增效作用,株防效为92.47%,鲜种防效为94.02%。4%烟嘧磺隆50mL/667m^2+72%2,4-D丁酯30mL