960g/L精异丙甲草胺乳油防治压砂西瓜田一年生杂草田间药效

Field Effects of 960g/L Metolachlor EC on Control of Annual Weeds on Gravel-mulched Field of Watermelon

为了更好地防除压砂西瓜田杂草，对960g／L精异丙甲草胺乳油防除压砂西瓜田杂草的效果及其对西瓜的安全性进行了田间小区试验。结果表明，960；／L精异丙甲草胺乳油756—936g a．i．／hm^2，对水750L／hm^2土壤啧雾，对一年生杂草的防除效果达到83．07％～90．73％，各处理区西瓜生长正常。960g／L精异丙甲草胺乳油安全性好、防效高、持效期长。

In order to better control the weeds on gravel-mulched field of watermelon,a field plot experiment concerning the effect of metolachlor 960 g/L EC on control of the weeds and its safety to watermelon on gravel-mulched field was carried out. The results showed that the control effects of metolachlor 960 g/L EC with a dosage of 756 g a.i./hm^2- 936 g a.i./hm^2 adding water 750 L/hm^2 to spray the soil on the annual weeds was 83.07%- 90.73% and the watermelon grew normally in all testing plots. The metolaehlor 960 g/L EC has been proved having high safety,good control effects and a long period of effectiveness.