Summer is the most suitable growth period for a variety of flowers, but because of the high temperature and good light, it is also the peak period for AIDS and insects. For this reason, when spraying pesticides and plant growth regulators, it is essential to maximize the efficacy of the drug and to master the optimal spraying time. Generally speaking, it is the best time before 10am every day and after 4pm. Because the dew is basically dry around 9 o'clock in the morning, and the temperature is not too high, it is the time when the sunrise pests are feeding the most, so the spray will not dilute the concentration of the liquid because of the dew. If the temperature is too high, the drug will decompose and volatilize to reduce the efficacy. After 4 pm, the sun is westward, the light intensity is relatively weakened, and the night-borne pests are about to start moving. At this time, the spray has a high insecticidal rate just before it is harmed. However, if you spray at noon, the effect is not good. First, the high temperature is easy to cause the pesticide to decompose and volatilize, the insects smell the medicinal taste and escape, and the long-term operators are prone to poisoning; the second is that the sun is strong, most of the pests hide in the back surface of the leaves, and even stop the activity, the insecticide rate after drug spraying It is much lower; in addition, the high light intensity will also cause the decomposition of the drug to reduce the efficacy. The above time is also preferred when spraying the growth regulator on the pots.
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