1 Select disease-free seed and seed treatment: Select disease-free plots to retain seed, freshly-seeded seeds are soaked in warm water at 50°C for 25 minutes, and sown after cooling. 2 Strengthen field management: Choose high-lying, well-drained, well-ventilated plots. Apply fertilizer and increase phosphorus and potassium fertilizers. Discover the diseased plants and remove them in time. After the harvest, the diseased bodies were completely removed, concentrated treatment, and deep plowing were performed to reduce the source of bacteria. 3 Pharmacy control: spraying prevention and treatment at the early stage of disease, spraying once every 7~10 days, even spraying 3~4 times, the commonly used agents are 1:1:240~300 Bordeaux mixture, 40% EB aluminum wettable powder 200~ 300 times, 25% metalaxyl WP 500-1000 times, 75% chlorothalonil WP 550-600 times, 65% zeocin WP WP 500-700 times, 64% antivirus, M8 wettable The powder was 500 times liquid, and 66.5% Preclosure was 700-1000 times liquid.
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