The amount of herbicide should be strictly implemented according to the standards specified in the instructions for use, and the amount of herbicide should not be increased at will. If 2 or more herbicides are mixed, the amount of each herbicide should be 1/3 to 1/2 of its conventional amount. The amount of medicinal liquid used per mu (after the raw liquid is mixed with water), the soil treatment of no straw returned to the field is not less than 30 kg, and the straw returned to the field is not less than 45 kg; For stem and leaf treatment, the weeds should not be less than 30 kg when the weeds are small, and not less than 45 kg when the weeds are large.