First, seed treatment
Seed treatment before sowing of corn can increase the germination rate of seeds, promote the growth of seedlings, and can also kill germs on the seed coat, reduce the damage of pests and diseases, and promote the seedlings in full, seedling stage, and seedling strong. Seed processing methods are:
1, drying seeds: The selected seeds are laid on the ground or on the seat, 5-6 cm thick, continuous sun drying 2-3 days, should not be spread directly on the seed in the cement or metal plate, so as not to overheated scald seeds .
2. Chemicals seed dressing: The prevention and treatment of corn virus disease can be used to increase the number of 100% of the plant disease disease by 1.5%, and the appropriate amount of water and water can be mixed with 50 kg of corn. Control of root rot and smut can be used 50% carbendazim or 25% triadimefamide 100-150 grams, dressing 50 kg; 50% phoxim EC can be used to control underground pests, watered amount, mixed with corn 100 kilograms, mix and dry after drying. For mixed occurrence of underground pests and corn diseases, mixed pesticides can be used for seed dressing. When dressing, first mix insecticides, then dry them and mix them with fungicides.
3, special coating agent coating. The dosage is 50 ml, which contains 5-7 kilograms of seed, which is both disease prevention and pest control.
Second, seedling control measures
1, corn weed control
Controlling weeds can reduce pests and breeding sites. Select high-quality herbicides on the road, master the best drug use period, increase the watering volume when spraying, and avoid high temperature and windy weather, evenly spray to the ground, so as not to re-spray or spray. Use strictly according to herbicide instructions to prevent damage. Commonly used herbicides are 1 mu with 40% EtOH mixture 150-200 liters, watered 50-80 kg, and sprayed before budding corn. 2. Use 18% of Jade Farm Music 80-100 milliliters per acre, watering 50-80 kilograms, and spray at the corn 2-3 leaf stage. 3, Mu with 50% Duo A mixture of 150 liters of water 50-80 kg, directed at the four leaf stage before the corn spray.
2. Seedling pest control:
(1) Laodelphax striatellus and aphids are corn insecticides, sprayed with 10% imidacloprid 1000 times.
(2) Controlling corn virus disease: In the one-leaf period of corn, mu is applied with 1.5% of disease-resistant Ling II No. 800-1000 times liquid, spray once every 7-10 days, 2 times in a row, and evenly spray on both sides of the blade.
(3) Pay attention to the occurrence of armyworm and prevent it from biting. As the armyworm is a migratory pest, attention should be paid to its development. When the third instar of the armyworm larvae occurs, small spots appear on the heart and leaves of the corn. Can use 25% diurea gum suspension or NPV virus preparation per acre 30-50 grams per acre,
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