Autumn sowing vegetables and disease prevention

Early autumn is the season of high temperature and rainy weather. Many vegetables suffer from diseases during this period. The main diseases are soft rot, downy mildew, and viral diseases. Therefore, the prevention and control of diseases caused by autumn vegetables is an important measure and guarantee for guaranteeing high yield, high quality and pollution-free production of vegetables. The following briefly describes several management points:

First, choose high-yield, disease-resistant, marketable varieties. The autumn sowing of Chinese cabbage promotes the planting of Fengkang 78, Zhongbai No. 4, Beijing New No. 3, Jincai No. 3, and Taiyuan Erqing. The vegetable farmer should choose the right variety according to his own use and purpose.

Second, a reasonable rotation. In the soil of continuous cropping fields, a large number of bacterial sources and insect sources are accumulated. The occurrence of pests and diseases is serious. Rational rotation can effectively reduce the occurrence of pests and diseases.

Third, apply the base fertilizer, scientific fertilizer. The production of autumn vegetables needs large amounts of fertilizer. Applying enough base fertilizer, especially decomposed organic fertilizer, can enhance the disease resistance of the plants and the top dressing should be scientific and reasonable.

Fourth, promote ridge cultivation of Chinese cabbage and appropriate sowing. Cabbage cultivation with high ridges or semi-high ridges can improve the microclimate in the field and suppress the occurrence and epidemic of diseases, especially for soft rot and downy mildew.

Fifth, strengthen field management. Autumn crops are planted during the flood season, with frequent rainfall and high humidity, which is conducive to the occurrence of diseases. To strengthen field management, timely drainage after rain, cultivator weeding, pest control in time, reduce the spread of disease. Wounds are an important way for pathogens to infect, and field management should try to avoid mechanical damage.

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