Rice blast disease diagnosis and control methods

1. Agronomic control measures. Select disease-resistant varieties, pay attention to breed collocation and rotation. Choose disease-free fields to keep seed, treat diseased rice straw to eliminate sterilization sources, and implement seed disinfection. Appropriate fertilizer and water management, adequate base fertilizer, early application of top dressing, moderate nitrogen application in the middle of the seedlings, later see seedlings make up fertilizer. Moisture management should be based on the principles of “pre-light, medium-sun, and post-humid”.

2. Pharmaceutical soaking and dipping. Rice seeds and seedlings were treated before sowing and before transplanting. Commonly used pharmaceuticals: 70% antibiotic "402" liquid, 40% different rice bran net emulsion, 40% Keyu powder, 45% bacillus soaking. Dip with 20% tricyclazole wettable powder for 5 minutes, remove and stack stuffy for 30 minutes and then insert.

3. Seedlings and leafhoppers control. Prevention and treatment of cervical palsy requires the combination of early prevention and control of rice seedlings and leaf blasts to reduce early disease and reduce bacterial sources: mainly to catch medications at the initial stage of disease; Honda starts from the stage of childbirth and finds acute lesions on the diseased center or leaves. Should fight drug control. Commonly used agents: 20% or 40% tricyclazole WP, 40% rice bran (Fuji No. 1) EC, 40% chlorsulfuron suspension, 20% tricyclic different rice wettable powder for water 45-50 Kilo fine mist even spray control.

4. Prevention and treatment of panicle blast. The booting (breaking) period and heading period are the appropriate period of prevention. Commonly used pharmaceuticals: 20% tricyclazole WP, 40% rice bran wettable powder, 21.2% hot Bicock powder, 2% added rice, 20% tricyclic different rice wettable powder, 40% g Loquat emulsions and other water 45-50 kilograms are sprayed once during the break period and at the heading stage. It is better to spray evenly on the upper part of the rice plant with a fine mist. Some new agents have better control effects on rice blast, such as Fumile, Phenytoxil esters and their compounding agents, but the price is higher.

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