At high temperature, pay more attention to medication, so that it can not only improve the efficacy, but also prevent poisoning. The following points must be understood when the vegetable farmers spray pesticides .
1. Properly reduce the concentration of the drug. The efficacy of most pesticides will increase with the increase of temperature. Therefore, the dosage of the drug solution should be reduced when using the drug in high temperature season, especially the steroid drugs. Heavy can easily lead to the occurrence of phytotoxicity. Therefore, it is necessary to adjust the concentration of the agent according to the change in temperature.
2. Improve the utilization of pesticides and increase the adhesion of the agents. When using pesticides for open-air crops, they should be selected to be resistant to rain, and emulsifiable concentrates are suitable. These pesticides have a long residual time on the surface of the plants, while powders and liquids are relatively poor. For many crop types, there are fluff or thick waxy layers on the surface of the leaves, such as corn, green onions, ginger, taro, etc. The liquid is easy to form droplets on the villi and waxy layers, and cannot fully contact the surface of the leaves of the plants. Adding an auxiliary agent such as silicone to the medicine to enhance the effect of the medicine.
3. Pay attention to the quality of the spray. In the case of spraying the pesticide, the pesticide droplets attached to the surface of the crop leaf are limited. When the spray volume exceeds a certain limit, the fine droplets on the leaf will condense into a large mist and roll. Falling and losing, on the contrary, the amount of pesticide attached to the leaves is reduced. The spray method generally requires uniform distribution of the spray droplets and high coverage, so that it is not necessary to drip the surface of the wetted plant, so that the sprayer used is required to have a good atomization effect and reduce the waste of the liquid. The pesticide network reminds everyone to pay attention to the comprehensive spraying, especially some pests like to spawn in the back of the leaves, especially when spraying the pesticide.
4. reasonable to prevent the spraying of pesticides poisoning <br> China Network Tips: dispensing, spraying pesticides to prevent corrosion of the skin, the use of volatile pesticides must pay attention to the use of masks, while prohibiting the midday heat in summer time spraying pesticides, spraying should be summer Choose to do it before 9am or after 4pm to avoid phytotoxicity. Do not apply too long for continuous application.
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