How can weeds be controlled effectively after sowing summer corn?
What is the best way to control weeds after sowing summer corn? Please give an introduction. Summer corn is generally sown in early June. During this period, temperatures are relatively high, and weeds grow quickly. Generally, 10 days after sowing, the peak of emergence is reached, and after 15 days, the number of emerged weeds can reach 90% of the total. Because corn plants are small during the seedling stage, they are vulnerable to weed damage. If not controlled in time, it can very easily...
What is the best way to control weeds after sowing summer corn? Please give an introduction.
Summer corn is generally sown in early June. During this period, temperatures are relatively high, and weeds grow quickly. Generally, 10 days after sowing, the peak of emergence is reached, and after 15 days, the number of emerged weeds can reach 90% of the total. Because corn plants are small during the seedling stage, they are vulnerable to weed damage. If not controlled in time, it can very easily develop into a weed infestation and seriously affect yield. Conducting soil-closure weed control after sowing and before emergence can eliminate weeds in the bud stage and achieve the goal of long-term weed control. Even for weeds that have already emerged, the seedlings are still very small, are more sensitive to herbicides, and are easy to control.
To do a good job of weed control in summer corn fields, the following points should be mastered:
1. Scientifically choose herbicides. Herbicides suitable for application after sowing and before emergence, with good weed control effects and high economic benefits, include 40% acetochlor-atrazine mixture, 72% Dual emulsifiable concentrate, 40% acetochlor-atrazine mixture, 50% acetochlor, and 50% butachlor-atrazine mixture. The control effects of these herbicides on grass weeds and broadleaf weeds can generally reach more than 80%.
2. Scientifically master the dosage. When the dosage is low, the weed control effect is poor and cannot reach the ideal effect; when the dosage is high, it is prone to cause phytotoxicity, increase costs, and reduce economic benefits. Therefore, when applying herbicides after sowing and before emergence, attention should be paid to controlling the dosage well. Under normal circumstances, the dosage of 40% acetochlor-atrazine mixture is preferably 180-200 milliliters per mu, the dosage of 50% acetochlor is preferably 80 milliliters per mu, the dosage of 72% Dual emulsifiable concentrate is preferably 175-200 milliliters per mu, the dosage of 40% acetochlor-atrazine mixture is preferably 150-200 milliliters per mu, and the dosage of 50% butachlor-atrazine mixture is preferably 300 milliliters per mu.
3. Master the water volume and dilution method well. When using power-driven spray equipment, the water volume is preferably 30 kilograms per mu; when using manual spraying, the water volume is preferably 50 kilograms per mu. If the soil is dry, the water volume can be appropriately increased to improve the weed control effect. When diluting herbicides, be sure to use the two-step dilution method, that is, first dilute the herbicide into a stock solution, and then add water to dilute it to the required concentration.
4. Scientifically master the application method and application period. When spraying, spray evenly on the soil surface while walking backward, ensuring no missed spraying and no repeated spraying. After spraying, cultivation should be prohibited to avoid destroying the surface sealing layer. The application period should be strictly controlled within 1-3 days after sowing to avoid phytotoxicity to seedlings from applying too late.
5. Pay attention to the local weather forecast. When applying herbicides, do not do so before heavy rain, so as to avoid heavy rain destroying the application layer. Choose windless or breezy weather for application to avoid droplet drift and harm to nearby sensitive crops.
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