March is the first critical period for the prevention and control of wheat pests and diseases in spring. The main pests and diseases are wheat rust, wheat root rot, wheat smut, and scab. If these pests and diseases are not well controlled, they will have a serious impact on wheat production, and pesticides should be controlled in time.
1. Wheat rust (brown rust, yellow rust, rod rust (black sputum), etc.) to prevent field disease.
(1) Select local disease-resistant and disease-resistant varieties.
(2) Chemical control: Triazolone 25% wettable powder 125 g per hectare. Carbendazim 10% wettable powder + mancozebium 59% wettable powder (250 g + 1.5 kg) / hectare. Can also prevent powdery mildew.
2. Wheat root rot (black granule) focuses on preventing seed-borne bacteria from reducing seedling damage.
(1) Soaking seeds with constant temperature water at 45 °C for 3 hours, and treating the black ear, black stalk, stalk, leaf stalk, nematode and seed scab.
(2) Seed dressing at a seed weight of 0.4% with methyl thiophanate 50% wettable powder.
3, wheat smut (gun stalk) to prevent seed bacteria, prevent field disease.
(1) Soaking with constant temperature water at 45 ° C for 3 hours.
(2) Seed dressing with seed dressing, the dosage is 1-1.5% of the seed amount, preventing pests and diseases, and increasing trace elements. It can also be seeded with 0.2% of seed dressing (40%) or 0.3% of the fungicide carbendazim (50% powder) for 20-24 hours. Or methyl thiophanate dressing.
4. Wheat scab eliminates pathogens and prevents field damage.
(1) The scab is mainly caused by wintering spread on wheat straw and wheat bran, and the diseased wheat straw and wheat bran should be thoroughly treated.
(2) Do not repeat, do not marry.
(3) Soaking seeds with constant temperature water at 45 ° C for 3 hours.
(4) Seed treatment with benomyl or methyl thiophanate.
5. Golden worms prevent larvae from harming seeds and seedlings.
Tips for the Chinese pesticide network : seed dressing with seed coating, the dosage is 1-1.5% of the seed.
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