1. Pest control at seedling stage
The major pests of corn seedlings include: armyworm, cotton bollworm, spurts, thrips, swat fly and so on. The control of armyworm and bollworm may use 5% beta-cypermethrin, 2.5% lambda-cyhalothrin 50-75 g/mu, and spraying 30 kg of water. The prevention and control of the Swedish fly must be controlled by spraying 50ml of 15% high-chlorinated chlorpyrifos at the beginning of corn emergence (ie, one leaf and one heart). If the affected plant is found in the field, remove it in time and endanger it. Cut the tip of the plant. Prevention and treatment of cultivating agrimony flour can be used 50% phoxim EC 500-1000 ml / mu, 48% Los Herbs 200-400 ml / mu for rooting.
2, seedling disease prevention and treatment
Seedling diseases mainly include corn rough dwarf disease. Dwarf diseases are transmitted by the planthoppers, so they should be well protected against insects. Prevention of virus diseases can be achieved by spraying insecticides on field side weeds before corn sowing or before emergence, spraying with imidacloprid, and applying one-leaf at a time, using 20% ​​of virus A wettable powder 500 times plus 10% of imidacloprid 30g/ Mu spray, spray once every 7-10 days, even spray 2-3 times; In addition, it can also take agricultural control measures to remove diseased plants and retain healthy plants when thinning seedlings.
3, weed control:
Before weeding, weeds have been unearthed and have high-density ground and furrows. They can be treated with chlorotoluene (paraquat) or glyphosate, etc.; Use 40% Ethylene Mixture 200g, or 50% isopropylate 200g, etc. Spray 40-50kg of water; corn emerge to 7 leaf stage, weed 2-3 leaf stage, 4% nicotinamide Long 90-100 grams, 30-50 kilograms of stems and leaves of water spray, pay attention to corn post-emergence herbicide in the application of pesticides within 7 days after the banned organophosphorus pesticides to avoid phytotoxicity.
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