50%乙·二·扑乳油播后苗前土壤封闭防除大豆田杂草田间药效试验

Study on Controlling Weeds in Soybean Land by Covering Soil Surface with Sprays of 50% EC of Prometryne, 2,4-D and Acetochlor Between Sowing and Emergence

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%。

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%.