First of all, let me first explain how spinach leukoplakia occurs. White spinach spinach fungus grows with mycelia in the soil with the diseased body, and the Hunchun spring spleen spreads through wind and rain. Weak growth, easy to disease in warm and humid conditions.
Symptoms: The symptoms of spinach leukoplakia mainly manifest on the leaves. The lower leaves began to develop. The lesions were small and round with sharp edges. The lesions were yellow-white in the middle, and the outer edges were brownish to purple-brown. They gradually developed into white patches. When the air humidity is high, gray hairs are visible on the lesions. When the air is wet and dry, the middle of the lesions is easily broken. The disease is caused by fungi.
Prevention: 1. Strengthen management and increase plant resistance to disease; 2. Remove diseased bodies in time after harvest to concentrate on deep-seated or burned, to reduce the source of disease; 3. In the early stage of disease, spray 50% carbendazim 800 times solution or 1 : 0.5:160 times the amount of Bordeaux mixture, 75% chlorothalonil wettable powder 700 times to control.
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