In recent years, with the cultivation mode, fertilizer and water conditions and the variety of wheat varieties, a large range of wheat yellow leaves dry roots and dead roots will appear in the spring wheat to green joints. According to analysis, this is caused by the single occurrence or mixed occurrence of wheat root rot and wheat sheath blight, which needs to be strictly guarded.
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Wheat root rot can infect the seeds, shoots, seedlings, roots, stems and ears of wheat, and the roots are the most seriously damaged. When the humidity is high, the diseased part can produce black gray mold, the young shoots, roots, and stem bases become brown or black. When severe, the stems are broken and dead, the plants are blue-gray, the white ears are not strong, and the base of the culms on the ear is flooded. Spotted, black mold layer on the surface. Under high temperature conditions, the neck of the ear becomes brown and rot, and the whole ear is dead.
Wheat sheath blight is infested from wheat after sowing, and it is conducive to the heavier occurrence of the disease under warm and humid conditions. At the onset of the disease, an elliptical or prismatic lesion with a yellowish brown edge on the middle of the leaf sheath is first produced. The leaves are dark green water stains. The lesions gradually enlarge, the water is yellow and the lesions are cloud-like. Inward development of harmful stems.
Wheat root rot and sheath blight are all soil-borne diseases, soil stickiness, less organic matter, poor permeability, insufficient light, low temperature and high humidity are all important reasons for the disease to increase year by year. In the prevention and treatment process, 85% of the bacteriocin, the carbunic WP 750 times solution + 15.5 % Jinggang · triazolone 750 times mixture or 50% chlorobromoisocyanuric WP 750 times solution + 25.9% Copper Complex, Complex Zinc, Lemon Water, 750 times Liquid, 0.255% Gibberellium, B., Moss, WP, 750 times mixed solution, 30% nail cream, carbaryl water 2000 times liquid, 20% rosin Acid copper water 2000 times liquid + 10% hi multi-water collecting agent 750 times mixed liquid, 58% fine nail cream · manganese zinc water dispersible granule 600 times liquid + 80% tebuconazole wettable powder 3750 times liquid + 1.8% complex Sodium nitrophenolate solution 4000 times mixed solution spray.
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