蚕豆田除草剂筛选初报

采用田间试验方法,研究了3种阔叶杂草除草剂复配1种禾本科杂草除草剂对蚕豆田间杂草的防效和安全性,筛选适于内蒙古中部蚕豆田使用的除草剂。结果表明,3种防除阔叶杂草的除草剂即10%乙羧氟草醚EC、21.4%三氟羧草醚AS、48%苯达松AS与1种禾本科杂草除草剂即5%精喹禾灵EC复配,不论是常量组合处理还是倍量组合处理,对蚕豆田杂草均具有较好的防效。所有处理对杂草的鲜重防效都高于株防效;对稗草的防效相当,差异不显著;对杂草的总防效以及阔叶杂草藜和反枝苋的防效3个倍量组合处理都显著好于常量组合处理,差异达极显著水平。田间安全性调查显示,5%精喹禾灵EC 60g/hm ²+48%苯达松AS 720、1 440g/hm ²处理对蚕豆有很好的安全性,可放心使用;其次是5%精喹禾灵EC 60g/hm ²+21.4%三氟羧草醚AS 321、642g/hm ²处理,5%精喹禾灵EC 60g/hm ²+10%乙羧氟草醚EC 90、180g/hm ²处理对蚕豆安全性较差,不建议使用。

Screening of Postemergence Herbicides in the Broad Bean Field

To screen out the herbicide suitable for use in broad bean field in central Inner Mongolia, three species of broadleaf weed herbicides were recombined as one grass weed herbicide and used to control weeds in broad bean field. The efficiency and safety of the combined herbicides were detected in the tested broad bean field. The results showed that the three herbicides were 10% fluoroglycofen-ethyl EC, 21.4% acifluorfensodium AS and 48% hentazon AS and 5% quizalofop-p-ethyl EC compound, they all had good control effect on weeds in the broad bean field whether it was the constant combination treatment or doubling combination treatment. The control effect of all treatments on the fresh weight of weeds was higher than that on plants of weeds, and the control effect of barnyard weeds was not significantly different. The total control effect of weeds and the control effect of broadleaf weeds that goosefoots and Amaranthus retroflexus was doubling combination treatment significantly better than the combination treatment, and the difference was extremely significant. Field safety investigation showed that 5% quizalofop-p-ethyl EC 60g/hm ²+48% hentazon AS 720, 1440g/hm² treatments were very safe for broad bean. 5% quizalofop-p-ethyl EC 60g/hm²+21.4% acifluorfensodium AS 321, 642g/hm² treatments ranked the second. 5% quizalofop-p-ethyl EC 60g/hm²+10% fluoroglycofen-ethyl EC 90, 180g/hm² treatments was not safe.