Cornstar 35WG防除夏玉米田杂草的药效与安全性研究

2003～2004年对Cornstar 35WG加助剂Biopower防除玉米田一年生杂草进行了田间研究,结果表明,Cornstar 35WG主要以杂草叶片吸收并在体内进行传导,根系也能吸收传导,对优势杂草马唐等一年生杂草防效优异,105～135 g/hm2对一年生禾本科杂草的株防效和鲜重防效均在95%以上,对总草的株防效和鲜重防效也在90%以上,所有用量下玉米生长无异常,说明Cornstar对玉米是安全的。因此认为Cornstar35WG在玉米5～6叶,杂草3～5叶时用Cornstar35WG105～120g/hm2(ai.36.75～42g/hm2)+Biopower900ml/hm2,对水450～600 kg/hm2进行茎叶喷雾处理,可有效地防除玉米田一年生杂草。

Efficacy and Safety of Cornstar 35WG on Controlling Weeds in Maize Field

The efficacy and the safety of Cornstar(foramsulfuron) 35WG mixed with an adjuvant,Biopower on annual weeds were investigated in maize field in 2003~2004.The results indicated that Cornstar 35WG was absorbed by weed leaf and root and translated in weeds.The efficacy was the most excellent against Digitaria sanguinalis(L.) Scop.in maize field.The efficacies against annual grass weeds were more than 95% and against all of annual weeds were more than 90% respectively at 105~135 g/hm2.Cornstar was safe to maize seedling at 105~135 g/hm2.Therefore,the annual weeds could be effectively controlled with Cornstar 35WG 105~120 g/hm2(ai.36.75~42 g / hm2) mixed with Biopower 900 ml/hm2 in tank according to 450～600 kg/hm2 water-diluted for spraying on maize 5~6 leaf-old seedling and weed less than 3~5 leaf-old.