Pesticide should be taken in the winter to take appropriate measures

Cold winter temperatures are relatively low, and pesticides should be given more attention when applying pesticides . The following are five recommendations for pesticides in winter:
1. Select the application when the temperature is slightly higher on sunny days. Because when the temperature is high in winter, the feeding rate and respiratory intensity of the pests are greater than the cold weather, the liquid is sprayed onto the worms, and the drugs are brought into the body, which is beneficial to the poisoning effect.
Second, the temperature is too low, the efficacy is not easy to play, and the dosage can be appropriately increased. The pesticide lethal dose of pests is not fixed. The lower the temperature at normal temperature, the lower the lethal dose of pests. Therefore, the appropriate dose increase in winter can prevent the insects from dying. However, it generally does not exceed 50% of the conventional dose. When applying pesticides in winter, water should be added strictly according to the dilution factor. Do not increase or decrease the amount of water.
Third, choose pesticides suitable for winter application. In general, stomach poisons and contact agents are less affected by temperature, and systemic and fumigants are more affected by temperature. Such as enemy killing, dichlorvos, dimethoate, methamidophos and other low temperatures will significantly affect the insecticidal effect. And pesticides such as deltamethrin, phoxim, and stone sulphur mixture can still exert better insecticidal effects when applied at lower temperatures. Herbicides are used at low temperatures in winter, and the time to display the effect is much longer than that at high temperature. Therefore, wait patiently after administration. As long as the liquid is sprayed in place, it is generally not necessary to re-spray.
Fourth, extend the safety interval of crops. In winter, the degradation rate of pesticides becomes slower, and the residual period of pesticides in crops is also relatively prolonged. When controlling pests and diseases of vegetable crops, attention should be paid to prolonging the safety interval of pesticides to ensure human health.
5. Pay attention to the dilution concentration. A small package of "medicine primer" or "vegetable oil" agent can be added as 15 g, or an acidic substance, etc. as an adhesive. However, it cannot be used when applying medicine to vegetables.

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