50%乙·二·扑乳油防除玉米田杂草药效试验

Studies on Controlling Weeds in Corn Field by 50% Acetochlor, 2,4-D and Prometryne EC between Sowing and Seedling

采用田间小区试验方法,进行了质量分数为50%乙·二·扑乳油播后苗前土壤封闭处理防除玉米田杂草药效试验。结果表明,50%乙·二·扑乳油对单、双子叶杂草均有较高防效,45d株总防效为78.68%～87.49%,鲜重总防效为77.07%～85.39%,随使用剂量增加,药效逐渐提高,而且对玉米出苗和生长发育无不良影响,增产幅度为11.79%～15.18%。

Good controlling effect to monocotyledon and dicotyledon weeds were achieved by spraying 50% Acetochlor, 2,4-D and Prometryne EC between sowing and seedling in corn field. The controlling effect of weed quantity was 78.68% to 87.49% in 45 days, while the controlling effect of weed fresh weight was 77.07% to 85.39%. Controlling effect was improved steadily as more chemical applied. All treatments increased the yield ranging from 11.79% to 15.18%.