During the rice planting period until the flood season, farmers should focus on the prevention and control of disease-borne diseases (bakanae, rice blast, dry acridosis, etc.), planthoppers and generation locusts. In the rice break period, we must focus on the prevention and control of rice planthoppers, rice leaf rollers, aphids, panicle blast, and rice smut diseases. In rice ear stage, rice planthoppers are the main target, and other pests and diseases are treated.
First, the prevention and control of rice planthoppers. Farmers should increase organic fertilizers, conduct soil testing and formulating fertilization, implement shallow water ground irrigation, and timely and appropriate field baking. A rice crop with or without chemical pesticides before the beginning of July will create favorable conditions for the breeding of natural enemies in paddy fields.
When the delivery period is 100 years, the youngest nymphs are 1000 (brown planthoppers account for more than 60%) -1500 (white backed planthoppers account for more than 60%), the booting period (bellied period) to the heading stage, 100 plexus young nymphs 1500 (B. More than 60%) - 2000 heads (more than 60% white backed planthoppers); after 2000 heads of younger nymphs, the farmers can use pymetrozine, buprofezin, ethiprole, chlorpyrifos, dichlorvos, etc. Prevention. For complex field plots of insects, it is advisable to choose two counteragents. When using the drug, use the amount of foot medicine, the amount of water (60 kg per mu), the position of spraying (middle and lower part of the rice plant), the maintenance of the water layer (about 5 centimeters of water layer for 5 days), and increase the amount of water in the dry field. Or fumigate with dichlorvos.
Second, rice leaf roller control. Farmers need to promote early-onset rice growth, moderate moderate-to-potato mid-season, and later use of nitrogen fertilizers.
In the year of major outbreak, the suitable period of prevention and cure is the peak period of egg hatching, and then it will be treated once again after 7 days; in the middle year of occurrence, the appropriate period of prevention and treatment will be the peak period of young larvae. Four (2) generations of rice leaf roller control Bt, avermectin and other agents can be selected (When the biological pesticide Bt is used, the control period should be at the peak of egg hatch); five (3) and six (4) On behalf of the control can choose avermectin, profenofos, chlorantraniliprole, A-dimensional salt and chlorpyrifos and so on.
Third, the prevention and control of rice borers. The winter plowing field timely pours deepwater and maintains deep water for more than one week, appropriately postponing the sowing date of rice, avoiding and alleviating the damage of the main damage generation. Reasonable use of drugs, the introduction of sex attractants, insecticidal lamp demonstration applications, in order to reduce the amount of chemical pesticides.
The second generation of the second generation of key cropping and control seedlings in the rice field of the second generation mainly used the Bt and its compounding agents at the peak of egg hatching or the control of insecticides at the peak of the 1st and 2nd instar larvae. The appropriate period of prevention and cure is at the peak of egg hatching, and the re-infested area will be treated once again from 7 days to 10 days. The agent used for the selection of A-dimensional salt, chlorpyrifos, fipronil, and avermectin compound; Alas, the second generation has chosen to rule dryness. When the egg mass density of mu was more than 120 blocks, it was controlled during the egg incubation period. The agent used avermectin compounding agent and insecticide list; the three generations were indicating the white spike, and the one-season rice break period (when 5 -10% when the rice breaks and exposes spikes) Medications are used to prevent and control. Triazophos, insecticidal or avermectin compounding agents are used. Farmers should pay special attention to the use of alternate types of pesticides in the process of prevention and control in order to delay the development of drug resistance. The field should try to keep the shallow water layer when spraying.
Fourth, rice blast prevention and control. Rice varieties should be replaced promptly after they have been planted continuously for 4-5 years. Before planting rice, farmers can use 25% prochloraz or 5.5% dithiocyano methane 2500-3000 times soaking. Farmers should pay attention to the reasonable application of nitrogen, phosphorus and potassium, and promote foliar spraying. Shallow water irrigation, timely and appropriate baking field.
In the prevention and treatment of seedling mites and leafhoppers, it was found that the central diseased plants were treated 1-2 times when the rate of diseased leaves or diseased leaves was 3-5%. For the prevention and treatment of panicle blast, the cultivars in the old wards should strictly prevent 3-5 days before the break and spray them one week later. The agents can be used for 40% rice bran, 75% tricyclazole, Bacillus subtilis, and Chunlei. Etc.
Fifth, rice stripe disease control. According to the performance characteristics of glutinous rice and japonica rice that are more important than japonica rice, the provincial Plant Protection Station recommended that the disease should focus on the compression of japonica rice and japonica rice in the rice area, expand the japonica rice, or promote the cultivation of salt rice No.8, Xudao No.3, Yanjing No.9 and Japonica rice 119. Fengliangyou 1, Fengliangyou 4 and other disease-resistant rice varieties. In serious areas, the use of insect-proof nets or non-woven fabrics for breeding should be advocated. One-season rice should be postponed by appropriate dates and live broadcasts should be promoted to avoid the generation of migratory and poisonous peaks in adult Smilax cornea. In severely afflicted areas, mature crops of wheat are harvested in Putian and treated with Scutellaria falciparum. Pesticides such as pymetrozine or chlorpyrifos, and Zhong Dingwei, etc. are used, and they are treated as pests in a timely manner. Diseases often occur in the second and third generation of hatchlings of the planthopper to the younger nymphs during the prosperous period of control, the use of drugs such as pymetrozine or chlorpyrifos, Zhongding Wei and so on.
Six, rice smut prevention and treatment. Farmers can choose Xieyou Series, D You 527, Xiushui 664 and other disease-resistant varieties. The first application was made 10 days before the rice break, and once again during the break period, the drug can be selected from tebuconazole, cesarean, konjac, and so on.
Seven, rice sheath blight prevention and treatment. When the farmers irrigated the paddy fields, they salvaged the “dross†that was blown by the wind and brought them out of the field for centralized treatment to reduce the initial bacterial source of rice sheath blight. Implement reasonable application of N, P, and K, and moderately field-baking at appropriate time.
In the field of early rice at the booting stage where the disease cluster rate reaches 20% and the heading stage disease rate reaches 40%, the field where the middle and late rice tillers reach the jointing stage disease rate reaches 20%, it is necessary to timely spray control, and the pesticide can be used 24 % Thioferamide Suspension (full spike), 20% Jinggangmycin WP, 5% Jinggangmycin Aqueous Solution, 12.5% ​​well wax, water repellent, etc. The liquid should be uniformly sprayed on the lower part of the rice plant. The severe disease field will be supplemented once every 7-10 days after the first application.