How to control weeds during summer corn cultivation?
How to control weeds when planting summer corn? Please explain the methods. When planting summer corn, you can refer to the following two methods for weed control: The "seal-and-kill" weed control technique involves a "seal-and-kill" treatment before corn emergence after sowing, that is, using a soil-sealing herbicide in combination with a non-selective herbicide, so that a single application achieves both soil sealing and killing of visible weeds...
How to control weeds when planting summer corn? Please explain the methods.
When planting summer corn, you can refer to the following two methods for weed control:
The "seal-and-kill" weed control technique
Before corn emergence after sowing, carry out a "seal-and-kill" treatment, that is, use a soil-sealing herbicide in combination with a non-selective herbicide, so that a single application achieves both soil sealing and killing of visible weeds. For rotary-tilled plots, only a soil-sealing herbicide may be selected.
Herbicide selection and formula: For the soil-sealing herbicide, per mu you can choose atrazine 38% suspension concentrate 100-150 ml + acetochlor 50% emulsifiable concentrate 100 ml, or isopropachlor·atrazine 40% suspension concentrate 200 ml. For the non-selective herbicide, use glyphosate 41% aqueous solution 150-200 ml per mu, dilute in 50 kg water, and spray evenly on the soil surface.
"Stem and leaf" treatment weed control technique
At the 3-5 leaf stage of corn (2-4 leaf stage of weeds), use a stem and leaf treatment herbicide for stem and leaf spraying to control weeds. Herbicide selection: per mu you can choose nicosulfuron 4% suspension concentrate 70-100 ml, or nicosulfuron 4% suspension concentrate 50-80 ml + atrazine 38% suspension concentrate 100-150 ml, dilute in 50 kg water, and spray evenly.
Different corn varieties differ in sensitivity to stem and leaf treatment herbicides, and their safety order is dent corn greater than flint corn greater than popcorn greater than sweet corn. Generally, corn is sensitive before the two-leaf stage and after the ten-leaf stage, so use should be avoided at those times.
When spraying herbicides, choose a fan nozzle, dilute with water according to the safe dosage, and spray evenly without repeated spraying or missing any area. For fertile soil and soil with high organic matter content, choose the upper limit of the recommended dosage. For sandy soil, barren soil, and plots with low organic matter content, choose the lower limit.
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