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Second, the appropriate amount of sowing in the appropriate period as appropriate, so that the 6-leaf stage of seedling susceptible disease can avoid high temperature and drought and other unfavorable conditions, due to high temperature and drought in most parts of our province in July this year, it is recommended that the sowing date be postponed by 3 days than normal. 3 to 5 days after the beginning of autumn is appropriate. The seeding amount of mu is about 200 grams.
3. Seed treatment and seedbed treatment Before planting, seed dressing with 50% carbendazim or thiram double wettable powder, the dosage is 0.3%~0.4% of the seed weight. It can also be soaked in 50 ° C warm soup for 10 minutes. It is also possible to carry out seedbed disinfection by applying pentachloronitrobenzene plus thiram (1:1) to 4 g or 50% carbendazim 15 g or 15 to 20 g of seedling bed per square meter of seedbed.
Fourth, strengthen cultivation management In order to reduce the source of bacteria, it is best to work with non-crown crops every other year, and implement semi-high ridge cultivation. More than 5,000 kg of organic fertilizer is applied to the acre, and the nitrogen, phosphorus and potassium compound fertilizer is reasonably applied. Avoid field roots and wounds when working in the field. And time seedlings, fixed seedlings, remove diseased seedlings, and remove diseased plants.
First, the selection of resistant varieties can be selected Beijing Xiaoza 56 and 60, Chinese cabbage No. 3, Beijing New No. 1, Zhongbai No. 4, etc., soft rot disease areas should try to use medium-late maturing and straight-type varieties.
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