Chinese cabbage virus disease is also called "cough disease". When cabbage is infested, the leaves appear bright veins and mosaic shrinkage, distortion, necrotic spots, stripe spots, and the plants exhibit symptoms such as short flower malformation. Chinese cabbage can be susceptible from the seedling stage to the core stage. High temperature and drought, especially under high night temperature conditions, is a strong external condition for infection. It is mainly spread and spread by aphids as a medium for transmission.
Prevention and treatment method:
1. Use anti-virus varieties. Such as Beijing New No. 1, Baotouqing, Beijing Daqingkou and so on.
2, suitable sowing or later sowing can reduce the incidence.
3. Strengthen seedling management. Watering, no seedlings, strong ability to increase the disease resistance of plants.
4. Control mites in time. It is found that the mites can be sprayed immediately, and the cockroach can be sprayed with 40% dimethoate 2000 times solution or 20% methrin emulsifiable concentrate 3000 times, etc., and 0.3% potassium dihydrogen phosphate can be added during spraying. The efficacy and enhance the disease resistance of the vegetable strain.
5, found that the diseased plant should be immediately removed from burning or deep burial, and sprayed 500-800 times of planting disease for prevention.
6. In the early stage of the disease, spray 15% of the phytopathogenic emulsion 1000, spray once every 10 days, and spray 2-3 times continuously.
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