First, the selection of drugs must be accurate To prevent crop pests and diseases in winter, we must pay attention to pesticides that are less affected by temperature. In addition, in the prevention of diseases and pests in the dormant period of fruit trees, the use of mineral oil emulsions, pine ester mixture, lime sulfur and other soil pesticides, both economic and effective. Second, the amount of drugs to be large In the winter, the use of pesticides should be appropriately increased with the guidance of a professional to increase the concentration of the drug solution, but it must not exceed the “safety high concentration†(ie, the maximum allowable drug dose without phytotoxicity). Third, the timing is better That is, the pesticide is applied during the high temperature period on sunny days. Because the temperature and the range of the insect pests increase, and the feeding intensity increases, the application of the pesticide at this time is beneficial to improve the control effect. Fourth, the method is appropriate In the winter, crop pests and diseases in greenhouses are prevented and treated by smoke or dust as much as possible. If spray application is used, the number of controls and the amount of liquid to be sprayed should be appropriately reduced to prevent excessive humidity in the shelter. Fifth, the interval should be long In the cold season, the degradation rate of pesticides is slow, and the time left in the crops is relatively long, and the number of days from the last application of crops to harvesting must be appropriately extended to ensure food safety. Exam Bed,Hospital Exam Bed,Hospital Examination Bed,Medical Examination Bed Jiangyin Kaili Health-Care Equipment CO., LTD. , https://www.kailimed.com