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Main uses: 1. Benzoic acid herbicides (benzoic acid). It has the function of endogenous absorption and conduction, and has significant control effect on annual and perennial broad-leaved weeds. For wheat, corn, millet, rice and other gramineous crops to control pea, buckwheat vine, Chenopodium album, Niu Fanlv, big vetch, sago Lactuca, Xanthium, Bo Shuocao, field flower, cabbage, horsetail, carp intestines and so on. After spraying, the chemicals are absorbed through the stems, leaves and roots of the weeds, and are transmitted through the phloem and xylem. In general, 48% water agent is used for 3-4.5mL/100m2 (active ingredient 1.44-2g/100m2). Because of the narrow weed-killing spectrum of wheat straw, the effect on some resistance crossing is not good. It is less safe for wheat and is often mixed with 2,4-butyl or 2-methyl-4-chloroamine salts.