In winter, the temperature is low, and most of the activities and damages of pests and diseases are hidden and static. If pesticides are not used, the effectiveness of control is often unsatisfactory. In order to increase the use of pesticides, the following points must be noted in addition to the selection of pesticides on the road:
1, choose sunny high-temperature medication because pests in the winter when the temperature is high, the intake and respiratory intensity is greater than the cold weather, liquid sprayed on the body, the drug was brought to the body more, is conducive to play poison Kill effect.
2, appropriate increase in the amount of medication in the winter if you use conventional doses, pests can not eat after the death of drugs, so we must increase the amount of medication. Specifically, it should be based on the temperature, but it is generally not more than 50% of the conventional dosage. When applying pesticides in winter, water should be added strictly according to the dilution factor, and the amount of water cannot be arbitrarily increased or decreased.
3. Reasonable selection of pesticides suitable for winter application Under normal circumstances, stomach poisons and contact poisons are less affected by temperature, and inhalants and fumigants are more affected by temperature. For pesticides such as enemy killing and dichlorvos, low temperatures will significantly affect their insecticidal effects; and phoxim, lime sulfur and other pesticides can still exert good insecticidal and bactericidal effects when applied at lower temperatures.
4. The preferential use of soil-pesticide soils and pesticides is cheap, but 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.
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