5种除草剂防除油菜田主要杂草的比较试验

Comparision Test of Five Kinds of Herbicide against Main Weeds in Brassica campestris Field

研究了5种除草剂对油菜田主要杂草的防效。结果表明:35%乙·异恶松EC 1 200 g·hm-2对看麦娘、猪殃殃、婆婆纳等油菜田主要杂草45 d的防效均在93%以上,防效最优;33%二甲戊灵EC 2 250 g·hm-2,药后45 d对猪殃殃和婆婆纳的防效为89.7%和88.4%,但对禾本科杂草看麦娘的防效较差,仅为61.5%;72%异丙甲草胺EC 1 500 g·hm-2药后45 d对看麦娘的防效为87.7%,对双子叶杂草防效较差;50%敌草胺WP 1 500 g·hm-2药后45 d对单、双子叶杂草防效均低于74.1%,生产中不易单独施用。

This paper studied five kinds of herbicide against main weeds in Brassica campestris field. The results showed that the efficacy of acetochlor ＋clomazone 35% EC 1 200 g·hm-2was best to control Alopecurus aequalis Sobol, bedstraw, Veronica didyma Tenore, were all above 93% after 45 days. Pendimethalin 33% EC 2 250 g·hm-2to control bedstraw, Veronica didyma Tenore, were89.7% and 88.4%,but poaceae weeds Alopecurus aequalis Sobol was 61.5%, the efficacy was poor; the efficacy of metolachlor 72%EC 1 500 g·hm-2to control Alopecurus aequalis Sobol was 87.7%, the efficacy ofdicotyledonous weeds was poor; Napropamide 50%WP 1 500 g·hm-2to control monocotyledonous weedsanddicotyledonous weeds were less than 74.1%, unsuitable for separate application.