What is the method of prevention and control of rice heart borer?

What is the method of prevention and control of rice heart borer? Please refer to the following methods to control the rice core borer: first, eliminate the source of overwintering insects: through ploughing and planting or shallow rotary tillage, reduce the residue of rice stump, clean up rice straw, root out Zizania caduciflora and weeds on the edge of the field and ditch, so as to reduce the source of insects, destroy the overwintering place of borer, and reduce the survival rate of borer overwintering. Second, update rice varieties: compress or eliminate a small number of varieties that are particularly susceptible to insects, so as to reduce the pressure of chemical control and the occurrence base. Third, dry cultivation in fertile bed: compared with raising seedlings in water, the number of eggs of Chilo suppressalis in the field is lower and the damage in the field is lighter. Fourth, flooding to kill pupae: because the first hatching of Chilo suppressalis harms the leaf sheath of rice, the late-maturing winter field and grass seed remain in the field, and most of the pupae can be drowned by flooding 3.5-6.5 cm during the pupation period. Or in the first and second generation larvae mature stage of dry field water, let the larvae drill into the root mark pupation, pupation period submerged in deep water for 3 days, most of the pupae can be drowned, and the insecticidal effect is more than 90%. 5. late sowing at the right time, cultivation and avoiding borer: popularizing the light cultivation technology of rice in an all-round way can appropriately postpone the sowing date of rice, make the seedling stage of rice prone to laying eggs avoid the peak spawning period of the first generation of borer, and reduce the number of eggs in the seedling field. Reduce the number of occurrence of the first generation of borer and the number of occurrence of borer in the whole year, to achieve the purpose of cultivating and avoiding borer. 6. Chemical control: ① adheres to the prevention and control strategy of "ruthless treatment for the first generation and universal treatment for the second generation". The first generation aims at lowering the base number, and the control effect is obvious in the seedling field. The second generation aims at controlling hazards, ensuring production and winning a bumper harvest. ② grasps the insect situation and ensures that the drug is applied during the peak period of egg hatching. ③ selects the right medicament to ensure the control effect. Medicament control should choose medicament according to different regions and generations according to local conditions, minimize the frequency and dosage of medication, rotate the use of drugs, slow down drug resistance, and choose low toxicity and biological pesticides. ④ is applied correctly to exert its efficacy. The application mode of controlling the second generation of Chilo suppressalis, pouring with flood and coarse spray is better than that of fine spray and mist, and chemical control should be used in the withered sheath period. Spray and control more than 50 eggs per mu in time during the peak egg hatching period, the withered heart and sheath can be used in the ant borer stage (egg hatching peak); the white panicle can be used in the early stage of rice break (about 10%), and when a large number of insects occur, it should be prevented for the second time in 5-7 days after medication. Applicable medicament: 50 ml of 5% Regent suspension per mu, or 48% of 50 ml of Lexben 50 ml per mu to control the first and second generation of Chilo suppressalis and Chilo suppressalis, with broad spectrum and persistence, and can also control gray planthopper and rice weevil; biological pesticide Sutrin is used before egg hatching and young age peak; 51% rice farmer 1 50 grams per mu, or 46% special killing borer 60 grams, spray with water 37.5 kg. Click to get more Pesticide Application techniques click to get more Pesticide Application techniques click to get more Rice planting techniques