40%苯苄乙草胺WP防除水稻抛秧田杂草效果研究

对40%苯苄乙草胺WP、10%苄嘧磺隆WP、50%苯噻酰草胺WP、20%乙草胺WP、60%苯噻苄WP防除水稻抛秧田杂草的效果进行研究.试验结果表明:40%苯苄乙草胺WP在水稻抛秧后5～7 d施药,可有效防除稗草、节节菜、矮慈菇、鸭舌草、异型莎草等各种稻田常见杂草,用药量600-750 g/hm~2,药后40 d对各类杂草总草株防效、鲜蕈防效分别达83.8%～88.6%、94.4%～96.4%,显著高于对照药剂60%苯噻苄WP 600 g/hm~2、10%苄嘧磺隆WP 300g/hm~2和50%苯嚷酰草胺WP750 g/hm~2防效.

Control Effects of 40%Mefenacet+Bensulfuron-methyi+Acetochlor Wet Powder on Weeds in Seedling Throwing Paddyfield

The control effects of 40%Mefenacet+Bensulfuron-methyl+Acetochlor wettable powder (WP),10%Bensulfuron-methyl WP,50% Mefenacet WP,20%Acetochlor and 60%Mefenacet+Bensulfuron-methyl WP on weeds in seedling throwing paddyfield were studied in this paper.The experimental results showed that when 40%Mefenacet+ Bensulfuron-methyl+Acetochlor WP applied at 5 to 7 days after rice seedling throwing,it could effectively control the common weeds in paddyfield,such asBarnyard-grass,Rotala,Sagittaria pygmaea,Monochoia vaginalis,Cyperus difformis and se on,with the dosage of 600～750 g/hm~2.40 days after treatment,the control effects of total plant and fresh weight for each kinds of glass was 83.8%～88.6%and 94.4%～96.4%,respectively,which were significant higher than the effects of control(60% Mefenacet+Bensuffuron-methyl WP of 600 g/hm~2 ,10%Bensulfuron-methyl WP of 300 g/hm~2 and 50%Mefenacet WP of 750 g/hm~2).