Winter wheat in some provinces and cities in China is about to enter the sowing date. The seed dressing of wheat in the sowing date can effectively reduce the incidence of wheat seedlings in the seedling stage. The prevention and control techniques for diseases, pests and weeds in autumn seedlings are as follows. 1, to prevent wheat sheath blight, full-blind disease and other root diseases. Autumn seedling stage is the first infection peak of the above-mentioned diseases, and prevention at this time can have a multiplier effect. It is suggested that the land of wheat sheath blight, full-bleeding disease and other diseases occurred in recent years, with 12.5% ​​diniconazole WP 15-20 grams or 15% triadimefon WP 75 grams per acre, and water 40-50 Kg, Shun Mai ridge spray seedlings to reduce the incidence of the coming year. 2, control powdery mildew, rust and other leaf diseases. When the diseased plant rate reaches more than 10%, it is recommended to use diniconazole, triadimefon and other agents for spray control, especially for wheat stripe rust prevention and control to take "drug investigation, discovery, control a piece of" control measures, The disease is controlled at the beginning of the disease. 3, control of wheat aphids, wheat spiders, aphids and other pests. When the planting rate exceeds 5%, and 100 plants have more than 20 planthoppers, they should be treated with 50% anti-indoles or 10% imidacloprid. When the length of wheat spiders on a single row of ridges reaches 50 or more, avermectin and peony may be used for spraying. For each square meter of earthworms and earthworms that have 5 heads, and 10 or more cornfieldworms, they should be immediately treated with medication. 4, reduce the underground pest base. When the wheat field due to the death rate of soil pests reaches 3%, immediately use 40% phoxim EC or 40% methylisotriphoris EC 200-250 ml per mu water 2.5 kg, mix fine dry soil 30~35 kg mix Evenly, it was made into poisonous soil, and it was applied in the control of wheat ridges. 5. Pre-winter wheat field weed control technology. The best prevention and treatment period of wheat field weeds is in the 3-6 leaf stage after the emergence of winter wheat, 2-5 leaf stage of broadleaf and grass weeds (before 2 tillers), and the seedlings are basically produced. For the control of broad-leaved weeds such as SVW, Laverna, Iongrass, Maijiagong and Polyporus umbellatus, 10% tribenuron-methyl WP can be used for 10 grams per mu or 75% tribenuron-methyl dry suspension per acre. 1g, watering 30 to 50 kg spray; also can choose 72% 2,4-D butyl ester EC 50 ml per mu, watered 40 to 50 kg spray. In addition to controlling the weeds such as barley and Aegilops falciparum, in addition to manual extraction, mu can be sprayed with 3% Shima oil suspension 25 to 30 ml (plus special safener) and watered 30 to 40 kg evenly; Control wild oats, mu 6.9% Dianma concentrated emulsion 40 ~ 50 ml, 30 kg evenly sprayed. When applying pesticides, pay attention to: 1. Special equipment must be used for the use of 2,4-D butyl ester. At the same time, care should be taken to prevent the liquid from drifting to other nearby crops in order to prevent phytotoxicity. 2. Based on the correct selection of herbicide types, strictly control the dosage, the best application period, and the temperature and humidity requirements of the pesticide application. Generally, the pesticide application is free of frost and heavy rain in the sunny days, and noon light is good and the temperature is The use of 10 ~ 20 °C is best, can be basically absorbed within 4 hours, the minimum temperature during the use of drugs is generally not less than 6 °C, to avoid the effect of low temperature and produce phytotoxicity. Explosion-Proof System,Combustible Gas Detector,Fire Gas Alarm Detector,Ultraviolet Flame Detector LIAONING YINGKOU TIANCHENG FIRE PROTECTION EQUIPMENT CO.,LTD , https://www.tcfiretech.com