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Clean the countryside. In order to prevent the spread of viruses such as short stumps, yellow dwarfs, and mosaics of wheat, the vector insects such as planthoppers and mites can be cleaned before and after planting. In the natural land unit, regardless of crop fields, idle land, roads or ditches, the weeds are first removed, and then 80% of the enemy emulsifiable concentrate 80-100 grams or 5% imidacloprid 20 grams per acre is sprayed once (note melon Fruits, vegetables, and crop safety near harvested fields can reduce the damage of wheat aphids.
Use reasonable seeding methods. The selection of wheat vegetable intercropping, wheat peanut intercropping, and rapeseed cultivation in wheat fields is conducive to the occurrence of natural enemies of pests, and the continuous occurrence and annual circulation of various natural pests of farmland are improved, thereby improving the regional ecological control level.
Fertilization health care. Through formula fertilization, limited use of chemical fertilizers, increase the amount of organic fertilizers, biological fertilizers and other measures, in promoting the robustness of wheat seedlings, improve the ability of insect resistance, but also promote the proliferation of beneficial microorganisms in the soil, inhibit the occurrence of harmful bacteria. Restricted use. Fertilizer. It can also guarantee the quality of products. On the basis of formula fertilization, 1.5 kg of zinc sulphate per acre can increase soil nutrients and effectively prevent root diseases such as total etch and sheath blight.
The agent treats the seed. Pharmacy treatment of seeds is an effective measure to prevent wheat seed transmission, soil-borne diseases and underground pests during seedling stage. The use of systemic insecticides to treat seeds can also prevent nursery hazards. At present, the best fungicide used for seed treatment is 3% dichlorvos. When 2.5% is suitable, the insecticide has 60% methylammonium phosphate, 40% methylisophosphorus, 50% phoxim, especially In the mixed area of ​​wheat pests and diseases, one of the fungicides and one insecticide can be used for seed dressing at 0.2% of the seed amount, and the desired effect can be obtained.
Field control in seedling stage. After the emergence of wheat, the weeds in the field were unearthed. When the weeds were 3-3-4 leaf stage and the body resistance was poor, the chemical weeding was carried out in a timely manner, which had the advantages of good herbicidal effect and little effect on the posterior ridge. For wheat fields with broadleaf weeds, use 75% of 15% or 10% of fensulfuron per acre, or 10 ml of 5.8% of maixi emulsifiable concentrate, and evenly spray 40 kg of water on stems and leaves. For wheat fields where heavier weeds occur, 6.9% of the 60-70 ml spray can be mixed.
If the nursery occurs in the wheat seedling stage, it can be sprayed with 40% dimethoate or other organophosphorus pesticides or 5% imidacloprid 1000 times solution. It can also be used for the prevention and treatment of the chrysanthemum pesticides such as Kung Fu and the chlorpyrifos 2000--3000 times. Safe growth, but pay attention to environmental pollution and agricultural drug residues.
Control of pests and diseases of wheat seedlings
The main pests and diseases of northern wheat fields are: wheat virus disease, wheat total erosion, wheat sheath blight, wheat leaf blight, wheat root rot, wheat bran, corn borer, cotton bollworm, broadleaf weeds, etc. In the prevention and control, we should follow the plant protection technical guidelines of "prevention first, comprehensive prevention and smelting", prevent disease before and after the disease, treat both the symptoms and the root causes, and aim at the economy, effective and safe.
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