At the end of the year at the end of the year, my county was generally affected by extremely severe low-temperature frost weather. The overwintering of seedlings in greenhouses and greenhouses was affected. The light leaves became green, yellow, white, and heavy. On the ground, the leaves that are chilled and frozen will eventually die and die. At present, the main vegetables in my county are cabbage, cabbage, broccoli, radish, lettuce, pea tip, and spinach, etc. The main wintering seedlings are pepper seedlings, eggplant seedlings, and tomato seedlings. To this end, the County Vegetable Office specifically proposed the following prevention and emergency remedial measures for the majority of vegetable farmers to fight their own disasters: 1. Beams: For Chinese cabbage, Ganlan, broccoli and other ball-bearing vegetables, the methods of bunching and cinching can be used to prevent cold, promote softening, enhance ventilation between plants, reduce pests and diseases, and the leaves should be in leaf or flower balls. After the basic formation, so as not to affect the photosynthesis of the outer leaves. 2, timely harvest, anti-freeze: radish, cabbage, cauliflower, broccoli and other mature, should be timely harvested and listed in order to improve product quality and economic benefits. For green leafy vegetables such as spinach, a thin layer of chaff or grass ash can be sprinkled on the leaves to reduce frost damage. 3, increase the cover: according to the temperature changes, timely film and cover the insulation cover, tightly sealed the shed body, improve the temperature of the shed, soil temperature, choose PVC anti-aging anti-drip or EVA high insulation without drops anti-aging shed Membrane, preferably with anti-fog function, to ensure the safe production of winter warm vegetables. When the temperature is lower than 8 °C, according to crop height, covered with a small shed or two curtains, multi-layer covering insulation. When the temperature is lower than 6°C, temporary warming measures must be added to prevent chilling or freezing damage. During the period of frost damage, covering the shade net on the outside of the greenhouse can not only block wind and snow, but also increase the temperature of the greenhouse by 2 to 3°C to reduce frost damage. If a small shed is used inside a greenhouse, during the period of frost damage, it will be removed every day at noon (two small holes) and ventilated for about one hour to prevent suffocation. 4. Flue-curing smoke in greenhouses: Pay attention to the weather forecast. Before the arrival of frost, flue-curing agents in the greenhouse can increase the temperature in the greenhouse, kill pathogens, and prevent the occurrence of diseases caused by freezing disasters. However, it should be noted that firewood can not be heated and heated in the shed, because the smoke emitted from the burning of the firewood has great harm to vegetables. 5. For vegetables that are affected by frost disasters, fast-acting chemical fertilizers can be applied, especially potassium phosphate monophosphate and other phosphorus and potassium fertilizers and trace element foliar fertilizers, so that the plants can rapidly absorb, increase their cell fluid concentration, and improve cold resistance and antifreeze ability and recovery. Growth ability. 6. Strengthen pest control: Special attention should be paid to the prevention and control of anthracnose in Chinese cabbage, vegetables, and cabbage. When there is a diseased plant, use defensive milking, bacteria standstill, Dasheng, Shigao, Nongken 120, Wuyimycin , Anthraquinone, US, Manson manganese zinc and other pesticides water spray. For gray mold of vegetables such as lettuce, Chinese cabbage, and spinach, it can be treated with Propionine, 1 Green Jiabao, and Grey Mold. Virus-resistant vegetables can be used to prevent and treat poisonous stars and bacteria. 7 Inch Biometric Tablet,7'' Android Biometrics Fingerprint Tablet,7-Inch Rugged Industrial Tablet,7'' Android Fingerprint Rfid Tablet Chongqing Huifan Technology Co.,Ltd. , https://www.huifantech.com