Control methods: 1, selection of disease-resistant varieties, pay attention to breed collocation and rotation.
2. Rice seed treatment before sowing: Soaking seed with 45% batramine; Applying marl fat and transplanting herbs before transplanting: Apply 3-5 kg ​​urea per acre for one week before transplanting to enhance plant disease resistance , and combined with the prevention and treatment of leaf rice blast and the prevention of aphids, fly fleas with the delivery of drugs. Can also be used 20% tricyclazole WP wet dipping for 5 minutes, remove the stack for 30 minutes and then plug.
3. Reasonable fertilizer and water management, sufficient base fertilizer, early application of top dressing, moderate nitrogen application in mid-term and seedling supplementation in later period. Avoid excessive or late nitrogen fertilizer application, and pay attention to increasing phosphorus and potassium fertilizers. Moisture management should be based on the principles of shallow water planting, deep water returning greening, thin moisture planting, and enough field drying.
4, pharmaceutical control. Ye Yu early detection and prevention; early from the delivery period, if found in the center of the disease or acute lesions on the leaves, should be promptly controlled.
Common agents: 6% of kasugamycin WP 30-40 g/mu, or 75% of tricyclazole wettable powder 30-40 g/mu or 40% of Fuji No.1 EC 100 ml/mu. Any one of the above-mentioned medicaments shall be sprayed with 45-60 kg of water for spray prevention and control, and shall be controlled once every 6-8 days. After 4 hours of spraying, the rain shall be sprayed in order to achieve the desired control effect.
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