杀草丹是近几年才发展起来的内吸阻塞型选择性除草剂。纯品是无色透明液体。在水田应用有如下特点:1.选择性强,杀草力大,对水稻安全。据试验,每亩用50%杀草丹乳剂4—5两喷雾,对稗草、牛毛草、三菱草、水沙草等具有良好的杀灭效果,杀草率达95%以上。对瓜皮草、野慈菇、鸭舌草、四叶萍也有一定杀灭效果。2.药效期较长,一般在30天左右,如果使用适时, Killer grass Dan is only developed in recent years blocked the selective absorption of herbicides. Pure product is colorless and transparent liquid. Application in the paddy fields have the following characteristics: 1. Strong selectivity, strong herbicide, rice safety. According to the test, with 50% to kill 50% herbicide Dan emulsion 4-5 two spray, the barnyard grass, ox hair grass, mitsubishi grass, water sand grass has a good killing effect, killing more than 95%. On the melon grass, wild arrowheads, Monochoria, four Ye Ping also have a certain kill effect. 2. Pharmacokinetics is longer, usually about 30 days, if used properly,