The temperature in winter and early spring is relatively low. In the prevention and control of crop diseases and insect pests, we must pay attention to the rational use of pesticides. First, rational use of pesticides. Some pesticides (such as dimethoate, etc.) are greatly affected by temperature, and their efficacy decreases significantly with decreasing temperature, while some pesticides (such as omethoate, etc.) are less affected by temperature, even at lower temperatures. (Under 15°C), it can also exert its normal insecticidal action. Similar to omethoate and cypermethrin, the toxicity of this insecticide at low temperatures (15°C) is higher than at high temperatures (25°C). Therefore, in winter and spring cold seasons to prevent crop pests and diseases, we must pay attention to pesticides that are less affected by temperature. Second, increase the dosage appropriately. When pesticides are applied in the low temperature season, the dosage should be appropriately increased and the concentration of the liquid medicine should be increased under the guidance of a professional, but it must not exceed the “safety high concentration†(that is, the maximum allowable dosage for which no phytotoxicity occurs). Third, choose sunny days high temperature application. When the temperature is high, the range of activity and respiratory intensity of pests increase, and the amount of food intake increases. At this time, the application of pesticides will improve the control effect. Fourth, improve the application methods. In the winter and spring seasons, crop pests and diseases in greenhouses should be controlled. Smoke or dust should be used as far as possible. If spray application is used, the number of controls and the amount of spray should be appropriately reduced to prevent the humidity in the greenhouse. Fifth, appropriately extend the safety interval. In the cold season, the degradation rate of pesticides is slow, and the time left in the crops is relatively long. It is necessary to appropriately extend the number of days from the last application of crops to harvesting (ie, the safe interval) to ensure food safety. Promotional Products,High Quality Promotional Products,Promotional Products Details, CN Guangdong Xinye RFID Label Application Co., Ltd , https://www.xinyerfid.com