The winter temperature is low, and the activities and hazards of pests and diseases are mostly in a hidden and static state. In the winter, chemical pesticides are applied. In addition to selecting the pesticides on the road, the following six points are also noted.
One is to choose the medicine for sunny days and high temperature. Because the pests in the winter when the temperature is high, their feeding and breathing intensity is greater than the cold weather, the liquid is sprayed onto the worm body, and the drugs are brought into the body, which is beneficial to play the poisoning effect.
The second is to increase the dose appropriately. The pesticide lethal dose of pests is not constant. The lower the temperature at normal temperature, the lower the lethal dose of pests, so it is necessary to increase the dosage in the winter, and it is possible to prevent death after eating pests. Peasant friends can determine the dosage according to the temperature, but generally does not exceed 50% of the regular 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.
The third is to rationally select 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 in the low temperature season in winter, and the effect of displaying the effect is much longer than that in the high temperature time. Therefore, wait patiently after the medicine, as long as the liquid is sprayed into place, generally no new spraying is required.
Fourth, we must extend the safety interval of crops. When pesticides are applied in winter, the degradation rate of pesticides becomes slower, and the period of recommendation of pesticides in crops is relatively prolonged. When controlling pests and diseases of vegetable crops in winter, special attention should be paid to prolonging the safety interval of pesticides to ensure human health.
Fifth, pay attention to the diluted solution of water in the barrel. 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, vegetables should not be used when applied.
One is to choose the medicine for sunny days and high temperature. Because the pests in the winter when the temperature is high, their feeding and breathing intensity is greater than the cold weather, the liquid is sprayed onto the worm body, and the drugs are brought into the body, which is beneficial to play the poisoning effect.
The second is to increase the dose appropriately. The pesticide lethal dose of pests is not constant. The lower the temperature at normal temperature, the lower the lethal dose of pests, so it is necessary to increase the dosage in the winter, and it is possible to prevent death after eating pests. Peasant friends can determine the dosage according to the temperature, but generally does not exceed 50% of the regular 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.
The third is to rationally select 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 in the low temperature season in winter, and the effect of displaying the effect is much longer than that in the high temperature time. Therefore, wait patiently after the medicine, as long as the liquid is sprayed into place, generally no new spraying is required.
Fourth, we must extend the safety interval of crops. When pesticides are applied in winter, the degradation rate of pesticides becomes slower, and the period of recommendation of pesticides in crops is relatively prolonged. When controlling pests and diseases of vegetable crops in winter, special attention should be paid to prolonging the safety interval of pesticides to ensure human health.
Fifth, pay attention to the diluted solution of water in the barrel. 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, vegetables should not be used when applied.
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