41%苯噻酰·吡(客杈多)可湿性粉剂配方筛选及田间药效试验研究

Formula-screening and Field Trails of the One Shot Herbicide of 41% Kechaduo in Transplanted Rice in Northeast China

经过室内配方筛选及田间小区对比试验,初步明确41%苯噻酰·吡可湿性粉剂组分配比和杀草谱,对水稻田常发生的稗草、异型莎草、牛毛毡、雨久花、鸭舌草、野慈菇、泽泻、萤蔺、眼子菜等禾本科、阔叶及莎草科杂草有特效,综和防效在85%以上。在单子叶杂草较多的田块使用量(有效成分)为615g/hm2,否则492g/hm2即可,施药时期应掌握在水稻返青后的杂草萌动期,可混拌过筛细沙、细土或化肥均匀撒施。

Multi-located field and the joint action of the herbicide combination of mefenacet and pyrazosulfuron-ethyl trails were conducted in2001to determine the selectivity and weed con-trol efficacy of41%Kechaduo in transplanted rice,the results were as follows:Excellent weed control performance were achieved when applied at the above-mentioned application timing,with an average control percentage higher than85%against barnyardgrass and almost complete control of various annual broadleaf weeds sedges including Barnyardgrass,Difformed Galingale,Eleocharis yokoscensis(Franch.et sav)Tang et Wang,Korsakow Monochoria oldworld Arrowhead,Oriental waterplantain,Rush-like Blurush,Distinct Pondweed,ect41%.Kechaduo gave excellent crop safety when used at5～10days after transplanting0～2leaf stage of barnyardgrass within492～615g.ai./hm 2 ,various application method is applicable,such as soil-based instant granule method.Fertilizer-based instant granule method.It is one of the best one-shot rice herbicides for using in transplanted rice of northeast China.