Cold days apply pesticide attention
2023-06-15 06:13:12
1. Select pesticides suitable for low temperature weather application
In general, stomach poisons and contact agents are less affected by temperature, and systemic and fumigants are more affected by temperature. If the enemy kills and other pesticides, the low temperature will obviously affect its insecticidal effect; while the pesticide such as stone sulfur mixture can still exert better insecticidal and bactericidal effect at lower temperature. In addition, herbicides are applied on cold days, which show a much longer effect than in the hot season. Therefore, be patient after the medication, as long as the liquid is sprayed into place, generally do not need to re-spray.
Second, choose a sunny day high temperature period medication
In the late winter and early spring, the feeding rate and respiratory intensity of the pests are greater than the cold weather, and the liquid sprayed onto the insect body is brought to the body relatively more, which is beneficial to the poisoning effect.
Third, the dosage should be appropriate
In the summer, according to the conventional dosage, the pests often die and eat. In the late spring and early spring, due to climatic factors, pesticides play a slower effect. Therefore, when the efficacy is low, the concentration can be appropriately increased, depending on the temperature, but generally does not exceed 50% of the conventional dosage.
Fourth, priority use of soil pesticides
Soil pesticides such as Bordeaux mixture and stone sulphur mixture are economical and effective in controlling pests, but care should be taken to avoid phytotoxicity.
V. Pay attention to the safety interval of pesticides
When pesticides are applied in winter and early spring, the degradation rate of pesticides becomes slower, and the residual period of pesticides in crops is also relatively prolonged. When controlling crop pests and diseases, special attention should be paid to prolonging the safety interval of pesticides to ensure human health.
In general, stomach poisons and contact agents are less affected by temperature, and systemic and fumigants are more affected by temperature. If the enemy kills and other pesticides, the low temperature will obviously affect its insecticidal effect; while the pesticide such as stone sulfur mixture can still exert better insecticidal and bactericidal effect at lower temperature. In addition, herbicides are applied on cold days, which show a much longer effect than in the hot season. Therefore, be patient after the medication, as long as the liquid is sprayed into place, generally do not need to re-spray.
Second, choose a sunny day high temperature period medication
In the late winter and early spring, the feeding rate and respiratory intensity of the pests are greater than the cold weather, and the liquid sprayed onto the insect body is brought to the body relatively more, which is beneficial to the poisoning effect.
Third, the dosage should be appropriate
In the summer, according to the conventional dosage, the pests often die and eat. In the late spring and early spring, due to climatic factors, pesticides play a slower effect. Therefore, when the efficacy is low, the concentration can be appropriately increased, depending on the temperature, but generally does not exceed 50% of the conventional dosage.
Fourth, priority use of soil pesticides
Soil pesticides such as Bordeaux mixture and stone sulphur mixture are economical and effective in controlling pests, but care should be taken to avoid phytotoxicity.
V. Pay attention to the safety interval of pesticides
When pesticides are applied in winter and early spring, the degradation rate of pesticides becomes slower, and the residual period of pesticides in crops is also relatively prolonged. When controlling crop pests and diseases, special attention should be paid to prolonging the safety interval of pesticides to ensure human health.
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