Prevention of pests and diseases: Diseases of summer cabbage disease are caused by soft rot disease under high temperature and humidity conditions. It can be sprayed with 50% carbendazim 500 times solution or agricultural streptomycin 1500-2000 times solution in the early stage. 1000 times liquid spray. Pests include moths, moths, radish and vegetable powdered coal, which can be used to prevent and treat pyrethroids and worms. Spring cabbage cultivation points: Spring cabbage can be listed in April-May, to overcome the off-season in spring and summer, increase color varieties, have a certain role, but to master special cultivation techniques to solve the early spring low temperature and long-day convulsions caused by mild, and mild Short seasons cause no contradiction in order to obtain high quality and high output. 1) Select the spring cabbage growth period of the season compared with the autumn of the short bulb period high temperature and rain, should choose the growth period is short 60-70 days, winter is strong and not easy to twitch the early maturing species. Such as Beijing's Xiaobaikou, Jingza 55, Jinan Xiaobaixin, Xiamen's unparalleled and so on. 2) Timely sowing and early avoidance of low temperatures The early spring temperatures in the Yangtze River valley are low, and they are generally planted at the beginning of March. In southern China, in mid-February, plastic sheds can be used to cover seedlings to prevent the temperature from falling below 15°C and planting in late March. The temperature is not lower than 8-10°C and prevents the vernalization through low temperatures. 3) The number of plants planted by dense planting can be increased by 1 to 2 times than normal, so that the early bolting plants with obvious wax powder in the heart can be removed and eaten as green leafy vegetables. 4) Apply sufficient amount of fast-acting fertilizer, timely irrigation, rapid formation of rosette stage and leaf ball, inhibit their development, so that the vegetative growth exceeds reproductive growth and prevent seizures.
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