First, the selection of 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 sunny days and high temperature period of medication in the late winter and early Spring when the temperature is higher, the pest intake and respiratory intensity is greater than the cold weather, the liquid sprayed onto the insect body is brought to the body more, which is beneficial to play poison Killing effect.
Third, the amount of medication should be appropriate in the summer according to the usual dosage, pests often eat and die. 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, the priority use of soil pesticides such as Bordeaux mixture, stone sulfur mixture, etc., pest control is both economical and effective, but care should be taken to avoid phytotoxicity.
5. Pay attention to the safety interval of pesticides. In winter and early spring, the pesticides will be degraded. The degradation rate of pesticides will be relatively slow. The residual period of pesticides in crops will be relatively prolonged. When controlling crop pests and diseases, special attention should be paid to prolonging the safety interval of pesticides to ensure the human body. health.
Second, choose sunny days and high temperature period of medication in the late winter and early Spring when the temperature is higher, the pest intake and respiratory intensity is greater than the cold weather, the liquid sprayed onto the insect body is brought to the body more, which is beneficial to play poison Killing effect.
Third, the amount of medication should be appropriate in the summer according to the usual dosage, pests often eat and die. 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, the priority use of soil pesticides such as Bordeaux mixture, stone sulfur mixture, etc., pest control is both economical and effective, but care should be taken to avoid phytotoxicity.
5. Pay attention to the safety interval of pesticides. In winter and early spring, the pesticides will be degraded. The degradation rate of pesticides will be relatively slow. The residual period of pesticides in crops will be relatively prolonged. When controlling crop pests and diseases, special attention should be paid to prolonging the safety interval of pesticides to ensure the human body. health.
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