What to pay attention to when spraying medicine at low temperature

     In the autumn and winter seasons, the temperature gradually decreases, and low weather and temperature have a great impact on the efficacy of pesticides, the damage of people and plants, and the pollution of the surrounding environment. If you don't pay attention, the spray will have no effect or even damage. happened.

   Therefore, we must learn to make reasonable use of weather conditions and master scientific pesticide application techniques to prevent pesticides from harming people and plants. Today, I will talk about the matters needing attention in the use of pesticides in low temperature environments.

      1. Reasonable selection of pesticides

    Some pesticides are greatly affected by temperature. When the temperature is relatively low, the effect of pest control will be weakened. Some pesticides can still exert normal control effects when the temperature is relatively low. Therefore, in the low temperature season, when choosing pesticides to prevent pests and diseases, you must understand the efficacy of the pesticides and the precautions for use, and choose pesticides that are less affected by temperature as much as possible.

     2. Appropriately increase the dosage

     The lower the temperature, the lower the chemical activity of some pesticides, and the lower the absorption and utilization of plant stomata and cells as the temperature decreases. Therefore, when applying pesticides in low-temperature seasons, it is necessary to scientifically and reasonably increase the dosage and increase the concentration of the liquid. But the concentration should not be too high to avoid phytotoxicity.

      Three, choose to spray during sunny and high temperature periods

     When the temperature is relatively high, the activity range and respiratory intensity of crop pests will increase, and the food intake will also increase. During this period of time, pesticide application will help improve the control effect.

      Fourth, improve the application method

     When preventing and controlling crop diseases and insect pests in greenhouses in winter and spring, smog, fumigation or dust should be used as far as possible to apply pesticides. If spraying is used for other reasons, it is necessary to appropriately reduce the frequency of prevention and treatment and the amount of spraying liquid to prevent excessive humidity in the shed. Microbial agents can be used as much as possible. In the case of high humidity, the activity of the bacteria will increase accordingly!

     5. Properly extend the safety interval

     In the low temperature season, the degradation rate of pesticides is slow and the remaining time in the crops is relatively high. There are hidden dangers in use. Therefore, the number of days from the last application of the crops to the harvest must be appropriately extended to ensure that the food is safe to eat.

     6. Appropriately increase the use of additives

As the temperature decreases, the chemical activity of the medicinal solution also decreases. If the medicinal effect of the medicinal solution is to achieve a better effect against diseases, insects and weeds, it is best to add essential oil additives to make the medicinal solution better absorbed and utilized. Better control effect.