为了探索绿麦隆防除麦田杂草的最佳施药期,1990—1991年我们进行了分期用药试验,结果表明绿麦隆在麦苗一叶一心期施用,除草效果最好。 2月下旬调查,亩用绿麦隆300克一叶一心期用药,除草效果为95.06％,比二叶一心期和立针期的防效高8.45％-9.03％,比播后芽前用药高12.9％;三叶一心期和四叶一心期用药防效明显下降,防效分别为75.61％、 In order to explore the best pesticide application period for control of weeds in wheat field from 1990 to 1991, we conducted the staged drug test, and the results showed that the application of chlorotoluron was the best in weeding once a day. Investigation in late February, mu with chlorothalonil 300 grams leaf one heart period of medication, the weeding effect was 95.06%, two leaf more than one period and the needle phase of the control effect of 8.45% -9.03% higher than before sowing after high medication 12.9% .There was a significant decrease in the control efficacy of clover, one-heart and four leaves and one heart, with the control effects of 75.61%