Infection: Spinachella flavescens mycelia with the disease in the soil in the winter, Hunchun bacteria spread by the wind, rain spread. Weak growth, easy to disease in warm and humid conditions.
Prevention: 1. Strengthen management and increase plant resistance to disease;
2. Dispose of the diseased body promptly after harvest and concentrate deeply or burn it to reduce the source of the disease;
3. In the initial stage of disease, spray 50% carbendazim 800 times or 1:0.5: 160 times Bordeaux mixture, 75% chlorothalonil wettable powder 700 times.
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