200g/L氯氟吡氧乙酸乳油对玉米田一年生阔叶杂草药效及安全性试验

Experiment on Effect and Security of 200 g/L Fluroxypyr-methyl EC on Controlling Annual Gramineous Weeds in Corn Field

对200g/L氯氟吡氧乙酸乳油防除玉米田一年生阔叶杂草药效及安全试验进行了研究。结果表明,200g/L氯氟吡氧乙酸乳油750～1050ml/hm2能有效地防除玉米田一年生阔叶杂草。药后10d,750、900、1050ml/hm2氯氟吡氧乙酸乳油对反枝苋、马齿苋、鸭跖草等阔叶杂草的株防效分别为87.9%、90.9%、93.7%,药后30d,750、900、1050ml/hm2氯氟吡氧乙酸乳油株防效分别为94.7%、96.3%、98.1%,鲜重防效分别为95.7%、97.5%、99.1%,且对玉米安全性好。

The effect and security of 200 g/L Fluroxypyr-methyl EC on controlling annual gramineous weeds in corn field were studied.The result showed that 200 g/L Fluroxypyr-methyl EC had good control effect against annual broadleaf weeds in corn field at 750～1 050 ml/hm2.In 10 days after treatment,the preventing effects of 200 g/L Fluroxypyr-methyl EC at 750 ml/hm2,900 ml/hm2,1050 ml/hm2 on plant of Amaranthus retroflexus,Portulaca oleracea,Commelina communis were 87.9 %,90.9 %,93.7 % respectively.In 30 days after treatment,the preventing effects of 200 g/L Fluroxypyr-methyl EC at 750 ml/hm2,900 ml/hm2,1050 ml/hm2 on plant and fresh weight of Amaranthus retroflexus,Portulaca oleracea,Commelina communis were 94.7 %,96.3 %,98.1 % and 95.7 %,97.5 %,99.1 % respectively.And 200 g/L Fluroxypyr-methyl EC was safety to corn.