都尔属选择性芽前土壤处理除草剂 ,主要用于防除 1年生禾本科杂草和部分阔叶杂草 ,如稗草、蟋蟀草、狗尾草、苋、藜、马齿苋等。为探索其防除甘薯田间杂草的效果和对甘薯的安全性 ,寻求最佳使用剂量 ,1 998～ 1 999年在我所试验田内进行了小区试验 ,现将试验情况及结果报道如下 It is mainly used for controlling 1-year-old grass weeds and some broadleaf weeds, such as barnyardgrass, cricket grass, Setaria viridis, amaranth, pigweed, purslane and the like. In order to explore its effect of preventing weeds in sweet potato field and the safety of sweet potato, seeking the best dosage, we conducted a plot test in our experimental field from 1998 to 1999. The test results and the results are reported as follows