6种除草剂对直播稻田杂草的防效及作物安全性比较

摘要

To screen the efficient,safe,broad-spectrum herbicides to rice seedling throwing weeds,control efficacy of 6 herbicides to rice seedling throwing weeds were compared in the field.The results showed that the control efficacies of 30％ pretilachlor E.C.and 90％thiobencarb E.C.were up to 90％,and they had better control efficacies,and also safety to rice.The control efficacies of 20％ bispyribac-sodium W.P.and 20％ pyrazosulfuron W.P.were 88.30％ and 74.13％,respectively.The control efficacies of 10％ cyhalofop-butyl E.W.and 85％MCPA-sodium S.P.were 31.88％ and 33.63％,respectively.%为筛选出防除直播稻田杂草的高效、安全、广谱药剂,笔者对丙草胺30％乳油等6种除草剂进行田间药效比对试验.结果表明,药后30d,丙草胺30％乳油和禾草丹90％乳油防效最好达90％以上,且对水稻安全；其次为双草醚20％可湿性粉剂和吡嘧磺隆20％可湿粉剂防效分别为88.30％、74.13％;氰氟草酯10％水乳剂和2甲4氯钠盐85％可溶粉剂防效较差,仅为31.88％和33.63％.