How to prevent and cure rice virus disease?

How to prevent and cure rice virus disease? Please introduce the method that the occurrence of rice virus disease is fulminant, intermittent and migratory. The occurrence of rice virus disease is closely related to tillage system, occurrence quantity and migration law of transmission mediators, climatic conditions and cultivation management measures. Prevention and control should implement the plant protection policy of "prevention first, comprehensive control", do a good job of pest control and disease prevention, farming system and rational distribution of varieties. The main control measures are as follows: first, strengthen monitoring and early warning, strengthen the monitoring and forecast of planthopper and leafhopper in rice (seedling) field and off-field, and guide the prevention and control work pertinently. Second, the selection of disease-resistant varieties is the most economical and effective measure to control virus diseases. at the same time, attention should be paid to the rational distribution of varieties to avoid mixed planting of varieties with different growth periods. Third, cut off the source of poison and remove the weeds around the field and reduce the source of insects. At the same time, we should do a good job of winter prevention. After harvesting late rice in seriously diseased areas, we should plow and dry the fields in winter and remove ratooning rice, weeds and other weeds on the edge of the field and the edge of the gully. 4. Do a good job of cultivation and management 1. Historical disease areas, properly adjust the sowing and transplanting period of rice during the suitable growth period, stagger the sensitive period of rice disease and the peak period of virus vector insects as far as possible, and the late rice seedling field is as far away from the early rice field as possible. 2. Strengthening the management of water and fertilizer, draining and drying the diseased fields in time, applying available fertilizer, increasing phosphorus, potash and farm manure, so as to enhance the disease resistance and insect resistance of rice. 3. Strengthen the field inspection and pull out the diseased plants in time. Fifth, pest control and disease prevention to eliminate the virus-carrying insects before transmission, especially to do a good job of pest control during the migration of the virus-carrying insects to the late rice seedling field and early planting Honda during the early rice harvest. 1. Do a good job of seed medicament treatment, mix 10% imidacloprid wettable powder 15 ml 20 grams per kilogram of rice seeds, and sow seeds after the solution is fully absorbed. 2. The seedling field should be far away from the diseased field, and centralized continuous seedling raising should be advocated. Control planthoppers and leafhoppers on crops or weeds around the seedling field before sowing. Actively popularizing pest control net to raise seedlings can effectively prevent the occurrence of rice virus disease. 3. If the occurrence of planthopper is light, we should pay attention to spraying seedling "marriage medicine" to prevent the transmission of rice blast and planthopper. 4. The control of rice planthopper and leafhopper should be done continuously at the seedling 2-Mel 7-leaf stage and the early stage of the field. 5. Spraying antiviral agents at the initial stage of the disease can inhibit the development of rice virus disease to a certain extent. Click to get more rice planting techniques click to get more food crop planting techniques