几种除草剂对新疆移栽稻田杂草的防除效果

Control Effect of Herbicides on Weeds in Transplanted Paddy in Xinjiang

通过田间药效试验,筛选对移栽稻田杂草具有较好防效的除草剂,为科学、安全、高效应用除草剂提供依据。结果表明,750 g a.i./hm^240%五氟·丁草胺悬浮剂+67.50 g a.i./hm^230%苄嘧磺隆可湿性粉剂或525 g a.i./hm^2500 g/L丙草胺乳油+67.50 g a.i./hm^230%苄嘧磺隆可湿性粉剂可用于移栽稻田土壤封闭处理,其对一年生杂草的株防效分别为83.90%、76.19%,鲜质量防效分别为94.29%、86.31%。针对以稗草发生危害为主的田块,可用90 g a.i./hm^210%精·氰氟乳油、1620 g a.i./hm^290%禾草丹乳油、24 g a.i./hm^225 g/L五氟磺草胺可分散油悬浮剂或120 g a.i./hm^2100 g/L唑酰草胺乳油+90 g a.i./hm^210%氰氟草酯乳油在苗后对茎叶进行喷雾处理,其株防效和鲜质量防效均在96%以上。

The present study was conducted to screen herbicides with better control effect on weeds of transplanted paddy field in order to provide guidance for scientific,safe and efficient use of herbicides.Mixtures of 40%penoxsulam?machette SC 750 g a.i./hm^2+30%bensulfuron methyl WP 67.50 g a.i./hm^2,and 500 g/L pretilachlor EC 525 g a.i./hm^2+30%bensulfuron methyl WP 67.50 g a.i./hm^2 were effective on weeds,achieving control levels of 84%and 76%based on plant number,and of 94%and 86%based on fresh weight.Formulations containing 10%Cyhalofop-butyl·fenoxaprop-p-ethyl EC 90 g a.i./hm^2,90%thiobencarb EC 1620 g a.i./hm^2,25 g/L penoxsulam OD 24 g a.i./hm^2 or 10%metamifop EC 120 g a.i./hm^2+10%cyhalofop-butyl EC 90 g a.i./hm^2 were effective against Echinochloa crus-galli;the plant and fresh weight control of this species in transplanted paddy fields was above 96%.