安阳地区夏大豆田杂草现状发生与防治

采用倒置9点取样法,对安阳地区杂草进行了调查,结果表明,夏大豆田杂草种类有14科26种,禾本科杂草有狗尾草、稗、马唐5种,阔叶杂草有马泡、马齿苋、婆婆纳等21种。杂草的相对多度在20以上的有马泡、马齿苋、牛繁缕、牛筋草、鳢肠5种,这些杂草发生普遍,危害严重。在大豆2～3片复叶,杂草2～4叶期用20%高盖40ml/667m2,一周后喷15%克草特15ml/m2或18%氟磺胺草醚.嗪草酸甲酯.烯草酮乳油75ml/m2,或14%氟磺胺草醚.精喹禾灵.嗪草酸甲酯乳油100ml/m2,加水50ml/m2,防效均在95%以上。

Occurrence and Control of Weed in Summer Soybean Fields in Anyang

Using inverted nine-spot sampling method,the weeds in Anyang were investigated.The results showed that there are 26 species of 14 families of weeds in summer soybean field,5 species of Gramineae weeds,and 21 species of dicotyledonous weeds.There are 5 species the relative abundance of weeds more than 20,which are in common and serious harm.When soybean has 2 to 3 compound leaves and weeds 2 to 4 leaves,using 20% Gaogai 40 ml/667m2,one week after spraying 15% Bensulforon-methyl-quiclorac 15 ml/m2,and so on,the control effects are more than 95%.