Chinese cabbage soft rot commonly known as "grub", occurred in the Chinese cabbage cabbage, began to produce water-stained lesions on the base or short-cut stems of the vegetables, and expanded from the outside to the inside; sometimes short-cut stem rot after Expand inside out. At the early stage of disease, the outer leaves are wilting, but early and late can still return to normal. Later, as the disease progresses, the outer leaves are drooping, the leaves are bare, and the base is rotted, giving off a foul odor, and the whole plant dies when severe.
Control methods: (1) Strengthen management. Early prevention and control of underground pests in time, since the seedling stage, timely prevention and treatment of flea beetle, cabbage caterpillar, diamondback moth, etc.; cultivator (especially at the end of rosette) should be shallow, so as not to hurt the roots, at the same time should pay attention not to damage the plants above the ground; fertilization should be uniform, Pay attention to the location and concentration of fertilization to avoid rot and burn. (2) Remove diseased plants. After entering the ball stage, pay attention to constantly observe field plants. Once the diseased plant is found, remove it deeply and use hydrated lime to spread around the diseased hole to prevent the spread of germs. (3) Reasonable irrigation and drainage. Drought should not be flooded with water, nor should local water, in order to facilitate the healthy growth of plants, improve disease resistance, to prevent the spread of pathogenic bacteria in the field; timely elimination of stagnant water after the rain. (4) Chemical control. At the seedling stage of cabbage or at the early stage of disease, spraying 200 grams of water per acre with 50 kilograms of water is very effective. In addition, the spraying of 50% dexamethasone 600-800 times solution, enemy powder raw powder 500-1000 times or 200 units of agricultural streptomycin, 200-400 units of chloramphenicol have some effect. When a large number of diseased plants occur in the late stage of Chinese cabbage growth or in the field, 500 grams of water per acre is used to water 100 kilograms per mu.
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