Control methods: 1. Select resistant varieties; 2. Collect seeds from disease-free plants, soak in seeds with water at 48°C for 30 minutes if necessary; 3. Perform rotation for more than two years; 4. Proper close planting, scientific irrigation, and prevention of excessive humidity in the field 5.In the early stage of disease, spray 50% carbendazim WP 800 times, or 50% thiophanate WP 500 times, or 77% WP 500 times. 6. Under the protective ground conditions, 5% chlorothalonil dust agent can be used, 1 kg per mu. Can also be used 45% of chlorothalonil smoke agent, 200 grams per acre, spraying every 9 days or so, continuous or alternating 2-3 times, the effect is good.
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