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[目的]通过田间药效试验明确30%苯磺隆·苄嘧磺隆·氯氟吡氧乙酸WP对春小麦田阔叶杂草的防除效果和田间推荐使用剂量。[方法]小麦4~5叶期,杂草3~8叶期,茎叶一次性喷药后不同时期调查杂草防效和对小麦影响。[结果]田间试验结果表明,30%苯磺隆·苄嘧磺隆·氯氟吡氧乙酸WP的田间推荐用量为135~180 g a.i./hm2,施药后40 d后对杂草株数总体防效达78.80%~82.88%,鲜质量总体防效达78.70%~84.31%。[结论]30%苯磺隆·苄嘧磺隆·氯氟吡氧乙酸WP能够有效防除春小麦田阔叶杂草并对小麦具有较好的安全性,在推荐剂量下春小麦增产率为6.50%~8.68%。
[Objective] The experiment was to determine the control effect of 30% tribenuron-methyl bensulfuron-methyl fluridepyruvic acid WP on broad-leaved weeds in spring wheat field and the recommended dosage in the field through the field efficacy test. [Method] The control effect of weeds and wheat on weeds in 4 ~ 5 leaf stage and 3 ~ 8 leaf stage of weeds and single time spraying of stems and leaves were investigated. [Result] The results of field experiments showed that the recommended dosage of WP for 30% tribenuron-methyl bensulfuron-methyl WP was 135-180 g ai / hm2. After 40 d, the total number of weeds Efficiency of 78.80% ~ 82.88%, the overall control of fresh quality of 78.70% to 84.31%. [Conclusion] 30% tribenuron-methyl bensulfuron-methyl flumorph could effectively control broadleaf weeds in spring wheat field and had good safety to wheat. The yield of spring wheat at the recommended dose was 6.50% 8.68%.