两种除草剂防除甘薯田杂草药效试验

Effect Test of Two Herbicides in Sweet Potato Field

用50％乙草胺乳油和50％异丙草胺乳油（地瓜草锄）两种除草剂进行甘薯田杂草防效试验。结果表明：50％乙草胺乳油对甘薯地杂草的防除效果最高在80％左右，每666．7m^2适宜用药量为180—200ml；50％异丙草胺乳油可有效防除甘薯田的禾本科杂草和部分阔叶杂草，并对甘薯安全，在防效上明显优于50％乙草胺，最高防效可达90％以上，是一种较好的甘薯田除草剂，每666．7m^2适宜用药量为250—300ml。

The comparative test of 50% Acetochlor EC and 50% Propisochlor EC （Diguatc） was carried out in sweet potato field. The results showed that 50% Acetochlor EC could control about 80% weeds in sweet potato field, whose appropriate dose was 180 - 200 ml per 666.7m^2. 50% Propisechlor EC could control above 90% weeds including most gramineous and part latifoliate weeds, whose appropriate dose was 250 - 300 ml per 666.7m^2. Besides, 50% Propisochlor EC was safe and harmless to sweet potato, and was a preferable herbicide in sweet potato field.