What should I pay attention to when spraying pesticides in low temperature weather?

In the case of 1 Temperature has little influence on gastric toxicity and contact toxicity, but has great influence on internal inhalants and fumigants. For pesticides such as diphacinone, low temperature will obviously affect its insecticidal effect; However, pesticides such as sulfur mixture can still exert good insecticidal and bactericidal effects at low temperature. In addition, the application of herbicides in cold weather takes longer to show its effect than in high temperature season. Therefore, wait patiently after taking the medicine. As long as the liquid medicine is sprayed in place, it is generally not necessary to spray it again.

2. Choose sunny days and high temperature periods. When the temperature is high in late winter and early spring, the food intake and respiratory intensity of pests are greater than those in cold weather, and the liquid medicine sprayed on insects is brought into the body relatively more, which is beneficial to play a toxic role.

3. In summer, we should use drugs properly according to the regular dosage, and pests often die because of taking medicine. In the weather of late winter and early spring, due to climatic factors, pesticides play a relatively slow role. Therefore, when the drug effect is low, the concentration can be increased appropriately, depending on the temperature, but generally it does not exceed the conventional dosage.

4. It is economical and effective to use soil pesticides such as Bordeaux mixture and sulfur mixture to control pests, but attention should be paid to avoid phytotoxicity.

5. Safe interval of pesticides in Italy

When pesticides are applied in winter and early spring, the degradation rate of pesticides is slow, and the residue period of pesticides in crops is relatively prolonged. In the prevention and control of crop diseases and insect pests, special attention should be paid to extending the safe interval of pesticides to ensure human health.