When is the effect of insecticidal and disease treatment good when to grow rice?

When is the effect of insecticidal and disease treatment good when to grow rice? How to control the pest of rice? Also ask experienced netizens to help introduce that the prevention and control of rice diseases and insect pests is the primary prerequisite for a bumper grain harvest, so the farming network has sorted out the best prevention and control methods of rice diseases and insect pests, which are listed in detail below for netizens' reference. 1. Rice planthopper: 1. Prevention methods: farmers should increase the application of organic fertilizer, carry out soil testing and formula fertilization, frequently irrigate in shallow water, and roast the field timely and appropriately. Before the beginning of July, single-cropping rice does not use or use less chemical pesticides to create favorable conditions for the reproduction of natural enemies in rice fields. 2. Chemical control methods: 1000 young nymphs at tillering stage (more than 60% of brown planthopper)-1500 (more than 60% of white-backed planthopper), 1500 young nymphs at booting stage (belly stage) to full heading stage (more than 60% of brown planthopper)-2000 (over 60% of white-backed planthopper) When there are 2000 young nymphs in 100 clumps after heading stage, farmers can use pyrazidone, buprofezin, acetonitrile, chlorpyrifos, dichlorvos and so on. For the fields with complex insect state, it is appropriate to choose the mixture of two kinds of insecticides. When using medicine, we should use sufficient amount of medicine, enough water (60 kg per mu), spray position (middle and lower part of rice plant), keep water layer (about 3 cm water layer for 5 days), increase water consumption in anhydrous field or fumigate with dichlorvos. 2. Rice leaf roller: 1. Prevention methods: farmers should promote early development in the early stage of rice growth, roast the field appropriately in the middle stage, and control the use of nitrogen fertilizer in the later stage. 2. Chemical control methods: in the large occurrence year, the suitable control period is the egg hatching peak period, and the supplementary treatment after 7 days; in the medium occurrence year, the suitable control period is the peak period of low instar larvae. Bt and avermectin can be used for the control of Chilo suppressalis medinalis in the fourth (2) generation (when the biological pesticide Bt is selected, the suitable control period should be controlled at the peak hatching period), and avermectin, probophos, chlorobenzamide, methamectin and chlorpyrifos should be selected for the control of the fifth (3) and sixth (4) generations. 3. Rice borer: 1. Prevention methods: ploughing and irrigating deep water in winter fallow field in time and keeping it for more than a week, appropriately postponing the sowing date of rice, avoiding and reducing the harm of the main damage generation. Rational use of drugs, development of sex attractants, demonstration application of insecticidal lamps, in order to reduce the amount of chemical pesticides. 2. Chemical control methods the first generation of Chilo suppressalis was mainly protected in early rice field and first-cropping rice field, and Bt and its compound were selected in the peak period of egg hatching or insecticidal single control in the peak period of 1st and 2nd instar larvae; the second generation focused on the control of single-cropping rice field, and the suitable control period was in the peak period of egg hatching, and the reoccurrence area was treated again after 7 days to 10 days, and the compound of methamidone, chlorpyrifos, fipronil and avermectin was selected. The first generation of Chilo suppressalis combined with the control of Chilo suppressalis, and the second generation selected to treat withered heart. When the density of eggs per mu reached more than 120, the compound agent of avermectin and insecticide were selected during the peak period of egg hatching, and the third generation was used to treat white panicles, and the compound of triazophos, monosulfonate or avermectin was used in the break period of first-season rice (when 5-10% of rice broke and exposed ears). Farmers should pay special attention to the alternating use of different types of pesticides in the process of control in order to delay the emergence of drug resistance. Try to keep the shallow water layer in the field when applying pesticide. 4. Rice blast: 1. Prevention methods: Rice varieties should be changed in time after planting for 4-5 years. Farmers can soak rice seeds with 2500-3000 times of prochloraz or 5.5% dithiocyanate before sowing. Farmers should pay attention to the rational application of nitrogen, phosphorus and potassium, and advocate spraying foliar fertilizer. Irrigation in shallow water frequently, roasting the field timely and moderately. 2. Chemical control methods: when controlling seedling plague and leaf plague, it is found that the central diseased plant is treated or when the diseased leaf rate reaches 3-5%, the pesticide is applied for 1-2 times. For the prevention and control of panicle blast, the susceptible varieties in the old disease areas should be strictly prevented by spraying 3-5 days before the break, and then replenished a week later. 40% rice plague, 75% tricyclazole, Bacillus subtilis, Chunramycin and so on can be selected. 5. Rice stripe blight: 1. Prevention methods: according to the performance characteristics that japonica and glutinous rice are heavier than indica rice, the provincial plant protection station suggested that the disease should focus on compressed japonica and glutinous rice in rice areas. expand indica rice or popularize rice varieties with good disease resistance, such as Yandao 8, Xudao 3, Yanjing 9, Wandao 119, Fengliangyou 1, Fengliangyou 4 and so on. The use of insect prevention net or non-woven cloth to raise seedlings is advocated in seriously diseased areas, and the sowing date of one-season rice is postponed appropriately, and direct seeding is advocated in order to avoid the peak of adult migration and transmission of the first generation of gray planthopper. 2. Chemical control methods: in the mature harvest stage of wheat in seriously diseased areas, gray planthopper was commonly treated with pyrazidone, chlorpyrifos and aldicarb, and timely supplementary treatment according to the situation of the pest. In the disease-prone areas, the second and third generations of gray planthopper eggs were hatched to the peak stage of young nymphs, and the insecticides were pyramidone, chlorpyrifos, aldicarb and so on. 6. Rice false smut: 1. Prevention methods: farmers can choose disease-resistant varieties such as Xieyou series, Dyou 527, Xiushui 664 and so on. 2. Chemical control methods: the first application 10 days before the break of rice, and another supplementary treatment during the break period. Tebuconazole and well? Wax aphids, wells? Uniconazole and so on. 7. Rice sheath blight: 1. Prevention methods: farmers salvage the "wave residue" blown to the edge of the field by the wind when irrigating and raking the field, and take it out of the field for centralized treatment to reduce the initial bacterial source of rice sheath blight. Implement the rational application of nitrogen, phosphorus and potassium, and roast the field timely and moderately. 2. Chemical control methods: in the fields where the disease cluster rate of early rice reaches 20% at booting stage and 40% at heading stage, and the disease cluster rate of middle and late rice reaches 20% from tillering to jointing stage, it is necessary to spray and control in time. Agent can choose 24% thiofuramide suspension (full panicle), 20% Jinggangmycin wettable powder, 5% Jinggangmycin water agent, 12.5% well? Wax aphid water agent, etc., the liquid should be evenly sprayed in the middle and lower part of the rice plant. The seriously diseased fields were treated again 7-10 days after the first application. What is the disinfection method of rice seeds caused by chlorobenzamide?