It is a systemic selective herbicide that is mainly absorbed by roots, stems and leaves. 1 year old broadleaf, such as cockroach, cockroach, cockroach, mustard, bitter leeks, sorghum, buckwheat vine, citron, artemisia, foxtail, foxtail, yarrow, cocklebur, geranium, crabgrass, wild oat Grass and some 1 year old grass weeds have good control effect.