Prevention of Black Root Disease in Cabbage
Q: After the cabbage is planted, the brown stems do not appear brown patches, accompanied by white hyphae. How is it going to happen and how to prevent it? Answer: According to the description this is cabbage black root disease. Cabbage dark root disease mainly affects the roots and stems of cabbages at the seedling stage or shortly after colonization. The pathogens use sclerotia or mycelia to overwinter in the soil or the diseased bodies. The soil temperature begins to germinate at a temperature higher than 10°C, and it enters the saprophytic stage. The bacteria from the root stomata, Direct invasion of the wound or epidermis causes the onset. After the disease minister, the mycelium continues to spread around, and the spores are produced and scattered to fall on the stems and leaves and then infested. The disease mainly infects the roots and stems of seedlings, causing the diseased part to become dark or curled up. When it is wet, it produces white mold. After the plant becomes infected, the leaves will wilt and dry out within a few days, resulting in the death of the whole plant. Lack of seedlings. Control methods: After colonization, 90% carbendazim 600 times or 50% isoprenil 1500 times can be sprayed directly on the base of stems of the cabbage, spraying once every 3 to 5 days can effectively control the occurrence.
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