【摘要】 50%乙·二·扑乳油播后苗前土壤封闭对大豆田杂草有较好的防治效果,对单、双子叶杂草均有较高防效,45d株总防效为76.58%～89.63%,鲜重总防效为76.89%～90.22%,随使用剂量增加,药效逐渐提高,以420g/667m2(处理4)防效最高,而且对大豆出苗及生长发育无不良影响,增产幅度为11.05%～22.68%。更多还原

【Abstract】 Good controlling effect to monocotyledon and dicotyledon weeds was achieved by soil spraying of 50%EC of Prometryne, 2,4-D and Acetochlor between sowing and emergence. The controlling effect was 76.58%～89.63% by weed quantity and 76.89%～90.22% by fresh weight in 45 days. The controlling effect is correlated with dosage. The optimum dosage is 420g per 667 m2, at which the controlling effect is the best and growth of soybean seedlings were not affected. All treatments increased the yield by 11.05%～22.68%.更多还原