In the winter, when chemical pesticides are used, in addition to choosing pesticides on the road, we should also pay attention to the following six points.
Choose sunny high-temperature medication: Because the pests in the winter when the temperature is high, the food intake and respiratory intensity is greater than the cold and cold weather, the liquid sprayed on the body, the drugs are brought to the body more, is conducive to play a poisonous role.
Appropriately increase the dose: The lethal dose of pesticides for pests is not constant. The lower the temperature at room temperature, the lower the lethal dose of insect pests, so it is necessary to appropriately increase the dosage in the winter, and it can prevent insects from eating and eating.
Reasonable selection of pesticides suitable for winter use: In general, stomach poisons and contact poisons are less affected by temperature, and inhalants and fumigants are more affected by temperature.
Use of soil-based pesticides is preferred: soil pesticides have a low price, and the disadvantage is that they are prone to phytotoxicity. However, the dormant period of fruit trees is resistant to pesticides. Controlling pests with pesticides such as Bordeaux mixture and lime sulfur is economical and effective.
Extending the safety interval of crops: In winter, when pesticides are used, the degradation rate of pesticides is slowed down, and the residual period of pesticides in crops is also relatively prolonged. When pests and diseases in vegetable crops are controlled in winter, special attention should be paid to prolonging the safety interval of pesticides to ensure human health. .
Pay attention to the diluted drug solution per barrel: Add a penetrant or acid "washing powder" 10 grams as an adhesive. However, it cannot be used when applying on vegetables.
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