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How to manage Chinese cabbage during the rosette stage? These measures need to be mastered
Symptoms: It occurs in all regions and can cause damage both in the field and during storage. The disease usually starts at the base of the leaf stalk and spreads to the entire leaf and then the whole cabbage plant. The diseased part rots, and white cottony mycelium and black sclerotia grow on the surface. On seed-producing plants, the stems are mostly affected; the stalk area is initially light brown and sunken, then turns white, and the cortex decays...