4种苗前除草剂对沿海地区小麦田杂草的防除效果

Control Effect of Four Pre⁃emergence Herbicides on Wheat Weed in Coastal Wheat Fields

测定4种小麦田常见除草剂对杂草的防治效果,结果表明,除草剂丙草胺和绿麦隆对繁缕、葎草和硬草的株防效和鲜重防效达80%以上,而对猪殃殃的鲜重防效较差;噻吩磺隆对繁缕的防效高于90%,但对葎草、硬草和猪殃殃的防效较差;而吡氟酰草胺对麦田杂草猪殃殃、繁缕、葎草和硬草等起到完全杀灭作用。整体防除效果表现为吡氟酰草胺>绿麦隆>丙草胺>噻吩磺隆,在沿海地区可优先选择吡氟酰草胺进行小麦田苗前杂草的防除。

The control effects of four common herbicides in wheat fields on weeds were tested,the results showed that the weed number and the fresh weight control effects of Pretilachlor and Chlorotoluron on Stellaria media,Humulus japonicus and Sclerochloa dura were more than 80%,while the fresh weight control effects of Pretilachlor and Chlorotoluron on Galium spurium was poor;Thifensulfuronmethyl was more than 90%effective against Stellaria media,but less effective against Humulus japonicus,Sclerochloa dura and Galium spurium;Diflufenican had a com⁃plete killing effect on wheat field weeds,such as Galium spurium,Stellaria media,Humulus japonicus and Sclerochloa dura.The comparison of the overall herbicidal results showed that Diflufenican>Chlorotoluron>Pretilachlor>Thifensulfuronmethyl,and Diflufenican could be the preferred choice for the control of pre⁃emergence weeds in wheat fields in coastal areas.