Cold-day application of pesticides

First, the use of pesticides suitable for low temperature weather applications In general, stomach poisons and contact poisons are less affected by temperature, and inhalants and fumigants are more affected by temperature. For pesticides such as the enemy killed, low temperature will obviously affect its insecticidal effect; and pesticides such as lime sulfur can still exert better insecticidal and bactericidal effects when applied at lower temperatures. In addition, herbicides are applied on a cold day, and their display effect is much longer than that of the hot season. Therefore, be patient and wait patiently as long as the liquid sprays into place, generally do not need to re-spray.

Second, choose sunny high-temperature medication during the early winter and early spring when the temperature is high, the pest's intake and respiratory intensity is greater than the cold weather, the liquid sprayed on the body is brought to the body more, help to play poison Kill effect.

Third, the amount of medication should be applied in the usual summer dose, pests often eat and die. In late spring and early spring, due to climatic factors, pesticides have a slower effect. Therefore, when the efficacy is low, the concentration can be appropriately increased, depending on the temperature, but it is generally not more than 50% of the conventional dosage.

Fourth, preferential use of soil pesticides such as Bordeaux soil pesticides, lime sulfur, etc., pest control is both economic and effective, but pay attention to avoid injury.

V. Pay attention to the safety interval of pesticides. Apply pesticides in winter and early spring. The degradation rate of pesticides will be slower. The residual period of pesticides in crops will also be relatively prolonged. When pests and diseases are controlled, special attention should be paid to prolonging the safety interval of pesticides to ensure the human body. health.