精喹禾灵等药剂除草活性及对甘薯的安全性

[目的]探讨精喹禾灵等4种药剂防除甘薯田一年生禾本科杂草的可行性。[方法]采用室内盆栽法及田间小区试验测定了药剂对牛筋草等禾本科杂草的除草活性及对甘薯的安全性。[结果]精喹禾灵、高效氟吡甲禾灵、精吡氟禾草灵、烯草酮4种药剂的选择性系数分别为29.23、21.70、17.60、8.40,安全性均好;田间小区试验表明对禾本科杂草牛筋草、马唐等药后30 d株数防效及鲜质量防效均在90%以上。[结论]供试药剂对甘薯田一年生禾本科杂草防效均较高,对甘薯安全性好,可以在田间应用。

Activity to Weed Control and Safety to Sweetpotato of Quizalofop-P-ethyl

The feasibility was researched of 4 herbicides such as quizalofop-P-ethyl on grass weeds in sweet potato fields.[Methods] Potted plant and field plot were conduced to evaluate the herbicidal activity of herbicides on Eleusine indica and and safety on sweet potato.[Results] The selectivity coefficient of quizalofop-P-ethyl,haloxyfop-P-methyl,fluazifop-P-butyl and clethodim,were 29.23,21.70,17.60,8.40 respectively and they all have good safety to sweet potato.The control effect were above 90% of these four herbicides on E.indica,D.sanguinalis on 30th day after treatment.[Conclusions] The tested herbicides have high control effect on grassy weeds and good safety to sweet potato,which can be applied in fields.