Practice has proved that spraying pesticides in summer, whether for food crops, vegetable crops, cash crops, or fruit trees, should be the best time between 8:00 am and 5:00 pm. What is the reason for this? This is because: around 9 am, the general dew is dry, the temperature is not too high, it is the sunrise, pests feeding, activity, mating the most vigorous time, so the medication at this time, will not be washed or diluted by the dew Reduce the efficacy of the drug, and will not affect the efficacy of the drug due to high temperature. On the contrary, the use of drugs at this time will increase the chances of pests feeding and taking medicine, effectively improving the lethality of pesticides. At about 5 o'clock in the afternoon, the sun is already westward. It is the day when the Japanese medicine Xishan is in the evening. At this time, the light is getting weaker and the night pests are active (feeding, mating, etc.), so the spray is also high. Kill the effect. Also note that it is not advisable to spray pesticides at noon. Therefore, the temperature is high, the sun is strong, and some pests are afraid of glare and hide in the backlight, or even stop the activity. In addition, the drug decomposes rapidly at high temperatures, so the efficacy is reduced. At the same time, the general drug solution is evaporated at noon, which is easy to cause poisoning of humans and animals.
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