Can I spray pesticides in hot weather? What should I pay attention to when spraying pesticides?

When the temperature is high at noon, the pores on the surface of the object are open, breathing is vigorous, and water evaporation is intensified. At this time, the powder or acid-base components in the medicine are applied to the stomata of the leaves and stems of crops, which increases the water supply burden of crops, destroys the physiological functions and tissues of crops, and causes the tender parts of crops to wither or the leaves to burn. The body temperature of pests changes with the change of environmental temperature. When the environmental temperature is too high, it will interfere with the normal metabolism of insects and make their physiological functions disorder. So in the hot noon, some pests hide in the shade, some lie motionless on the back of leaves, some hide in the gaps of nearby grass, and some lurk under the old bark of branches and upturned bark or get into tree holes.

The vast majority of plants need the best nutrients at low temperature, but in the morning, due to the large dew, the proportion concentration of pesticides is undoubtedly greatly reduced. At the same time, due to the large dew of crops, some pesticides drop to the ground with the dew at this time, thus reducing the adsorption amount of pesticides on crop leaves and reducing the use effect on crops. Ability to significantly improve the efficacy, after a night of absorption, the absorption and utilization rate of pesticides absorbed internally is higher. If in the strong sunshine in summer, some of the liquid medicine will evaporate after atomization, which will reduce the efficacy, easily cause phytotoxicity to the fruit leaves and decrease the commodity rate.

It's too hot at noon, spraying pesticides is easy to dry, and it doesn't have much influence on insects. Another point is that because of the hot weather, people will sweat a lot when spraying pesticides, and pesticides are easy to be poisoned when spilled on their bodies. Generally, it is best to spray pesticides after the dew drops or spray them in the afternoon. I think so, too. The sprayed pesticides are released into the air, forming a stagnant pesticide gas field. At this time, people are working at high temperature, sweating and their pores are open. Drugs emitted in the air enter capillaries through pores and breathe into the lungs. People are easily poisoned by traditional Chinese medicine, and those who are serious die, and those who are light are hospitalized to take medicine. .