First, soil treatment: 1. Live corn field: on the day after corn sowing, or the next day, use 50% acetochlor 100ml (according to the actual use area, the same below) or 72% Dole EC 100ml, watering 50Kg, align the soil surface evenly spray. 2. Plastic film corn field: before filming after sowing, mulching corn field, use 50% of grass with 75mu of mu and spray evenly with water of 50Kg. 3. Transplanting corn fields: Transplanting corn fields are applied before transplanting, and the amount and method of use are the same as that of live corn fields. Precautions: Acetochlor is more sensitive to melons and faba bean seeds. When used, it strictly controls the dosage and low-level directional spray. Second, stem and leaf processing 1, corn 6-8 leaf stage, mu 40% positive or 30% Feida 200g, watered 50Kg low directional spray. When spraying, an anti-mist cover must be added to the spray head to prevent the liquid from floating to the crop. 2. Manual weeding: Combining field fertilization and cultivating tillage, artificial weeding can effectively control weed occurrence. China Extract Powder For Use As Dietary Supplement Extract Powder, Extract Powder Manufacturer Shaanxi Kang New Pharmaceutical co., Ltd. , https://www.kangnewpharmas.com