How to weed summer corn after sowing?

How to weed summer corn after sowing? Please give me an introduction. Summer corn is usually sown in early June. In this period, the temperature is higher, and the weeds grow faster. Generally, the emergence peak is reached 10 days after sowing, and the number of seedlings can reach 90% of the total after 15 days. Because maize is small in seedling stage and vulnerable to weeds, if it is not controlled in time, it is easy to form grass famine and seriously affect the yield. Weeding by soil closure before seedling sowing can eliminate weeds in the bud and achieve the purpose of long-term control of grass damage. Even the unearthed weeds are very small, sensitive to herbicides and easy to control. To do a good job in weeding in summer corn fields, it is necessary to master the following points: 1. Scientific selection of herbicides. The herbicides suitable for pre-sowing, good weeding effect and high economic benefit are 40% ethyl mixture, 72% Dur EC, 40% herbicide mixture, 50% Acetochlor and 50% butylamine mixture. The control effects of these herbicides on Gramineae weeds and broad-leaved weeds are generally more than 80%. 2. To master the dosage scientifically. When the dosage is small, the weeding effect is poor, which can not achieve the ideal effect; when the dosage is large, it is easy to produce drug damage, increase the cost and reduce the economic benefit. Therefore, attention should be paid to controlling the amount of herbicides when applying herbicides before seeding. In general, 40% of etochlor mixture is suitable for 180ml / mu, 50% of Acetochlor is 80ml / mu, 72% of EC is 175ml / mu, 40m / mu is 150ml / mu, and 50ml / mu is 300ml / mu. 3. Master water consumption and dilution methods. The suitable water consumption is 30 kg per mu for power spraying and 50 kg per mu for artificial spraying. If the soil is dry, the water consumption can be increased appropriately to improve the weeding effect. When diluting the herbicide, the second dilution method must be used, that is, the herbicide should be diluted to the mother liquid first, and then diluted to the required concentration with water. 4. To master the mode and period of application scientifically. Spray should be uniformly sprayed on the soil surface, so that do not leak spray, do not re-spray, after spraying to prohibit ploughing, so as not to destroy the surface sealing layer. The determination of the application period should be strictly controlled within 3 days after sowing, so as to avoid the damage to the seedlings caused by the application too late. 5. pay attention to the local weather forecast. When applying herbicides, do not do it before the heavy rain, lest the heavy rain damage the application layer, you can choose no wind or breeze weather to avoid fog droplets drifting and harm the surrounding sensitive crops. Click to get more corn planting techniques click to get more food crop planting techniques