Use proper pesticides in winter. Otherwise, the diseases and pests in the field are not well controlled, and the crops will also have problems, which will eventually lead to the reduction of yield.

When the temperature is low in winter, many activities and hazards of crop diseases and pests are hidden and static:

1. To control crop diseases and insect pests in winter, we should pay attention to the selection of pesticides less affected by temperature.

2. Pay attention to the choice of medication time. Because when the temperature is high in winter, the range of activity and respiratory intensity of pests increase, and the food intake increases. When the liquid is sprayed on the insect pests, more drugs are brought into the body, which is conducive to the toxic effect.

3. Extend the safety interval of crops appropriately. In winter, the degradation rate of pesticides became slower and the residual period of pesticides in crops was longer. In order to ensure human health, we should pay special attention to extend the safe interval of pesticides when controlling diseases and pests of vegetable crops in winter.

4. The pesticide should be fully dissolved and diluted. Appropriate amount of vegetable oil can be added as adhesive when diluting pesticide, and the pesticide can be dissolved and diluted by full stirring. However, vegetable oil and other adhesives should not be added to vegetables.

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