Root rot can occur in every growing period of wheat and can damage various parts of the plant, showing symptoms such as root rot, lesions in leaves, dead stems, and withered neck. At the seedling stage, wheat sheaths and roots turn brown and even rot. The mildly diseased plants grow thin and die shortly afterwards; young sprouts with severe disease can die without being excavated. During the delivery period, brown lesions appeared at the base of stems of diseased plants, and the leaf sheaths also turned brown and rot, resulting in increased ineffective delivery and clustering, and severe seedlings withered. After the onset of growth, the diseased plants were easy to pull up, but no root rot was found, causing lodging and the formation of a "white spike." In the spring, the temperature is not stable, and when it returns to cold in the cold season, the disease resistance of the wheat seedlings is reduced after being frozen, and it is easy to induce root rot, resulting in a large number of dead seedlings.
Wheat root rot is easy to prevent and intractable, and prevention should be the main method. The diseased plants should be promptly treated with drugs. Can be used in the early stages of disease, use of diniconazole, propiconazole, triadimefon, carbendazim, thiophanate-methyl drug spray control. The spray should be sprayed and sprayed thoroughly to fully penetrate the roots and stems. The use of triazole fungicides for seed dressing before sowing is the most effective measure to prevent the disease.
Rhizoctonia and full-bleeding disease also cause the base of wheat stems to rot and yellow leaves. Pull up the diseased seedlings and carefully inspect the diseased parts and roots of the wheat seedlings to distinguish these diseases. Wheat sheath blight mainly occurs on leaf sheaths and stalks. In the early stage, brown fusiform lesions were produced on the leaf sheath near the ground, and the center was light brown or grayish white. It gradually expanded and extended to the stems later, and the color became darker. The 1-2 kips of the base became black and even rot, often causing early death. Rhizoctonia stem disease and the base of the leaf sheath are usually damaged. The hand-pulled seedlings often break the base of the seedlings and cannot pull up the roots. After full-blown wheat disease, the roots and bases of the stems become dark in 1 to 2 knots, and the planting wells and dwarfs are small. The leaves gradually turn yellow from the bottom up, and the transporting tissues gradually become necrotic. The growth is blocked and the development is poor. The field after heading Clustered white ears or contiguous white spikes appear. "Black feet" and white spikes are typical symptoms of the disease. The roots of the fully eroded diseased plants are damaged, and usually they are pulled gently. The remaining roots are pulled apart, except for a part of the roots.
For wheat sheath blight, triazole drugs such as cymbalol, propiconazole, tebuconazole and hexaconazole can be sprayed and prevented at the early stage of disease. Triazoles sprays can also be used to control wheat after full-blown disease, but the control effect is not ideal. Full-bleeding disease should mainly be prevented by difenoconazole, tebuconazole, tebuconazole, and thifluzamide before seeding.
Wheat root rot is easy to prevent and intractable, and prevention should be the main method. The diseased plants should be promptly treated with drugs. Can be used in the early stages of disease, use of diniconazole, propiconazole, triadimefon, carbendazim, thiophanate-methyl drug spray control. The spray should be sprayed and sprayed thoroughly to fully penetrate the roots and stems. The use of triazole fungicides for seed dressing before sowing is the most effective measure to prevent the disease.
Rhizoctonia and full-bleeding disease also cause the base of wheat stems to rot and yellow leaves. Pull up the diseased seedlings and carefully inspect the diseased parts and roots of the wheat seedlings to distinguish these diseases. Wheat sheath blight mainly occurs on leaf sheaths and stalks. In the early stage, brown fusiform lesions were produced on the leaf sheath near the ground, and the center was light brown or grayish white. It gradually expanded and extended to the stems later, and the color became darker. The 1-2 kips of the base became black and even rot, often causing early death. Rhizoctonia stem disease and the base of the leaf sheath are usually damaged. The hand-pulled seedlings often break the base of the seedlings and cannot pull up the roots. After full-blown wheat disease, the roots and bases of the stems become dark in 1 to 2 knots, and the planting wells and dwarfs are small. The leaves gradually turn yellow from the bottom up, and the transporting tissues gradually become necrotic. The growth is blocked and the development is poor. The field after heading Clustered white ears or contiguous white spikes appear. "Black feet" and white spikes are typical symptoms of the disease. The roots of the fully eroded diseased plants are damaged, and usually they are pulled gently. The remaining roots are pulled apart, except for a part of the roots.
For wheat sheath blight, triazole drugs such as cymbalol, propiconazole, tebuconazole and hexaconazole can be sprayed and prevented at the early stage of disease. Triazoles sprays can also be used to control wheat after full-blown disease, but the control effect is not ideal. Full-bleeding disease should mainly be prevented by difenoconazole, tebuconazole, tebuconazole, and thifluzamide before seeding.
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