How to weed when planting corn?

How to weed when planting corn? Please guide the spring sowing corn field to be dominated by perennial weeds, perennial weeds and early spring weeds, such as Bowl flower, field rotation, borage, shepherd's purse, mud Hu vegetable, quinoa and so on. The weed community is generally composed of one or two kinds of weeds, and the dominant weeds are grass, Setaria mandshurica, Setaria angustifolia and so on. Corn field is greatly affected by weeds in seedling stage. The corn in the middle and later stage formed a tall airtight population, and the growth of weeds was inhibited and the damage was not great. Therefore, chemical weeding in corn field should be applied in the two key periods of pre-sowing and early post-seedling. 1. In the soil treatment before the temple after sowing, the key factors affecting the efficacy of soil treatment are soil moisture and soil preparation quality. in order to ensure the efficacy, low soil moisture should be irrigated and soil preparation should be fine. if the soil moisture is not good, shallow soil mixing or sprinkler irrigation can be applied to improve the efficacy. Atrazine, simazine, and the mixture of Hornus, Rasol, Duer, Weatong, etc., can effectively control a variety of weeds. Generally, 40% atrazine 200ml, 50% simazine 200ml, 40% atrazine 150ml 200ml + 48% lasso 150ml 200ml (90% Horace 80ml 100ml) are sprayed evenly with 250kg of water per mu. two。 Stem and leaf treatment, corn 3-leaf stage, monocotyledon weed 1.5-2.5 leaf stage, dicotyledonous weed 2-leaf 4-leaf stage, 40% atrazine 150-250 ml, 40% atrazine 150-200 ml + 72% Durol 100 ml (33% herbicide 150 ml) and water 25% 30 kg uniform spray, in order to control post-seedling broad-leaf weeds, in 4-year 6-leaf stage of corn, 72% 2% 4-butyl D-butyl 50ml was sprayed evenly, 75% broad-leaf net 1g: 250kg. It can also be used according to the instructions with special herbicides for cornfield. Click to get more herbicide application techniques