17 degree is suitable for spraying pesticides on sunny days? Why?

In the process of using pesticides, vegetable farmers' friends are most afraid of drug harm, and generally greet the dosage and time of drug use in agricultural stores! But the climate and temperature in different regions are different! The temperature that can be reached at 10 in the morning in the north can be reached at 8: 00 in the morning in the south, so it is the most inaccurate for vegetable farmers to use drugs according to the time period! Then, when taking medicine, what is the basis for determining the time of taking medicine?

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Temperature! Temperature is the most important factor for vegetable growth, and it is also the standard for determining the application time! Generally speaking, most pesticides are suitable for use in sunny and windless weather. When the dew on the leaves is dry, as long as the temperature is between 15~27℃, the temperature is also within this range within two hours after application! This can ensure the safety of medication and will not cause drug harm!

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Used for fruits and vegetables, such as tomatoes and cucumbers. In the flowering and fruit-setting period, it is recommended to choose a sunny and windless afternoon, because pollen is active in the morning and spraying drugs will affect pollination and fruit-setting! In addition, pay attention to taking medicine in the afternoon. When you need to put a quilt in winter, you should also ensure that the potion has the ability to cover the quilt again!

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Of course, there are also some pesticides that have special use time, such as pesticides that kill thrips, pesticides that kill whiteflies in the early morning or at night when the light is weak, pesticides that kill whiteflies in the morning when the humidity is high, and herbicides. Generally, the higher the temperature, the better the effect, but pay attention to avoid the highest temperature in summer, and the effect is not good if it evaporates too fast!