Five tips for applying pesticides in winter

1. Choose the medicine for sunny days and high temperature. Because the pests are in the high temperature period in winter, the feeding amount and respiratory intensity are greater than the cold weather. The liquid is sprayed onto the insect body, and the drugs are brought to the body more, which is beneficial to the poison. Killing effect.

2, appropriate increase in the amount of drugs in the winter if the usual dosage, pesticides often do not die after taking medicine, so it is necessary to increase the amount of medication. The specifics should be based on the temperature, but generally do not exceed 50% of the regular dose. When applying pesticides in winter, water should be added strictly according to the dilution factor. The amount of water should not be increased or decreased at will.

3. Reasonable selection of 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 pesticides, low temperature will significantly affect its insecticidal effect; and deltamethrin, phoxim, stone sulfur mixture and other pesticides can still play at lower temperatures Better insecticidal effect. In addition, herbicides are applied in winter, 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.

4, the priority use of soil pesticides and pesticides at low prices, the disadvantage is easy to produce phytotoxicity. Fruit trees are resistant to pesticides during the winter dormancy period. It is economical and effective to control pests with pesticides such as Bordeaux mixture and stone sulphur mixture.

5. Pay attention to prolonging the safety interval of pesticides. In winter, pesticides are applied. The degradation rate of pesticides is slow, and the residual period of pesticides in crops is relatively prolonged. When controlling pests and diseases of vegetable crops in winter, special attention should be paid to prolong the safety interval of pesticides to ensure Human health.

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