Herbicides: according to the role into Destuctive and selective herbicides and selective herbicides in particular, nitrophenol, chlorophenol, amino acid derivatives are most effective. World herbicide development has gradually become stable, mainly the development of efficient, low toxicity, broad-spectrum, low amount of variety, environmental pollution treatment agent disposable gradually become the mainstream. Herbicide Classification: According to the mode of action classification. Selective herbicides: Herbicide for different types of seedlings, different degrees of resistance, this drug can kill weeds tribenuron wholesalers, while the seedlings harmless. Herbicide: All plants are toxic herbicides tribenuron price, as long as the contact with the green parts, regardless of seedlings and weeds, will suffer or be killed. Mainly before sowing, before emergence after sowing, nursery primary and secondary lane use.