The best time to fold pesticides

Pesticide manufacturers must apply pesticides when pests and diseases occur during crop planting. When is the most effective playing time? China Pesticide No.1 is here to summarize some information for you. Cyanuric chloride is for reference only: the best spraying time for different crops in different seasons is somewhat different. For example, for cucumbers in greenhouses, generally speaking, In the summer and autumn high temperature season, the best time for pesticide application should be around 9 am and after 4 pm on a sunny day. Around 9 o'clock in the morning, the dew is generally dry and the temperature is not too high. At the same time, it is the most vigorous time for pests and diseases. At this time, the effect of medication is good; after 4 o'clock in the afternoon, the light becomes weaker and the temperature becomes lower, causing night-borne pest (Whiteflies, thrips) start to be active, and spraying at this time also has a higher bactericidal effect. Practice has proved that spraying pesticides in summer, whether it is for food crops, vegetable crops, cash crops, or fruit trees, should be between 8 and 10 in the morning and around 5 in the afternoon for synthetic ammonia manufacturers. What is the reason for this?

This is because: around 9 am, the dew is generally dry and the temperature is not too high. It is the most vigorous time for sunrise pests to feed, move, and mate. Therefore, the medicine 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 the decomposition of the drug due to high temperature. On the contrary, the use of pesticides at this time will increase the chances of pests to eat and touch the pesticides, effectively increasing the lethality of pesticides. At about 5 o'clock in the afternoon, the sun was already westward. It was at the time of "Nippon Medicine Xishan Evening Day". At this time, the light faded and the nocturnal pests began to be active (feeding, mating, etc.). Higher killing effect.

Also note that pesticides should not be sprayed at noon. Therefore, the temperature is high and the sun is strong, and some pests are afraid of strong light and hide in the backlight, or even stop their activities. In addition, the drug properties decompose quickly under high temperature, so the efficacy of the drug is reduced. At the same time, the general liquid medicine evaporates faster at noon, which can easily lead to human and animal poisoning.

In winter and spring low temperature seasons, the appropriate time for pesticide application is 2:30 to 3:30 in the afternoon. Because the temperature in the shed is low in winter and spring, photosynthesis gradually enters the peak period after the leaf dew recedes in the morning. If spraying in the morning will definitely affect the temperature increase and reduce the photosynthetic efficiency, it is not appropriate to use the medicine in the morning. Never spray medicine at noon on a sunny day. Because the temperature in the shed is high when spraying at noon, the high temperature easily promotes the decomposition of the medicine and the volatilization of the active ingredients of the medicine. In addition, the vitality of crops will become vigorous in hot weather, and the stomata on the leaves will be open and large. If the medicament is sprayed at this time, the medicament will easily penetrate into the crops, which greatly increases the probability of damage. In addition, when spraying at noon, the chemical activity of the medicament will become stronger, and the toxicity of the pesticide will also become larger, and it is very prone to poisoning accidents by the sprayer.