Highly selective herbicides. With the function of internal absorption, it can be used to control a variety of grass weeds in barley and wheat fields. After spraying the leaves, they are rapidly absorbed and transferred to the whole body of the plants. The weeds lose their greenness and then die. The general amount of spray 150 ~ 350g active ingredient / hm2. The amount of wild weeds used for weed control is 200-350g/hm2, effective from the early growth stage to the leafing stage and jointing stage.