It depends on the time to apply pesticides in summer.

Spraying pesticides in summer, whether for food crops, vegetable crops, cash crops, or fruit trees, should be the best time from 8 a.m. to 10:00 and around 5 p.m. This is because: around 9: 00 in the morning, the general dew is dry, and the temperature is not too high, which is the most exuberant time for sunrise pests to feed, move, and mate, so the use of medicine at this time will not reduce its efficacy because it is washed or diluted by dew. it will not affect the efficacy due to the decomposition of the drug caused by high temperature. On the contrary, the use of drugs will increase the chances of feeding and touching drugs of pests, and effectively improve the lethality of pesticides. At about 5 o'clock in the afternoon, the sun has been partial to the west, the light is getting weaker, and nocturnal pests become active (feeding, mating, etc.), so spraying at this time also has a high killing effect.

In addition, note that pesticides should not be sprayed at noon. Therefore, when the temperature is high, the sun is strong, and some pests hide in the backlight for fear of strong light, or even stop moving. In addition, the drug decomposes quickly at high temperature, so the efficacy is reduced. At the same time, the general liquid volatilized quickly at noon, which can easily lead to human and animal poisoning.