Whether in winter or spring, summer or autumn, medication should be avoided at noon on sunny days. Because the high temperature at noon on the sunny day facilitates the decomposition of pharmaceuticals and the volatilization of water in the liquid, when the weather is hotter, the chemical activity of the pharmaceuticals becomes stronger, and the toxicity of pesticides also increases. Especially when sprayed with emulsifiable concentrate and various herbicides at high temperatures, it is very prone to phytotoxicity and pesticide poisoning.
Spraying must avoid high temperatures during noon. In the cold season of winter and spring, pesticide application time is appropriate from 2:30 to 3:30 in the afternoon, and it is best not to use medication in the morning. Because the winter and spring seasons, the greenhouse temperature is low, dew in the morning after the retreat, the photosynthesis gradually entered the peak period, if spraying will inevitably affect the temperature, reduce the photosynthetic efficiency, so the morning should not be medication. The use of medication in the afternoon will not affect the temperature, which is conducive to the prevention and treatment of diseases and insect pests. If it encounters continuous sunny weather in winter and spring, when the temperature inside the shed is high, it can also be sprayed after 4 pm, which can also play a very good sterilization effect.
Spraying must avoid high temperatures during noon. In the cold season of winter and spring, pesticide application time is appropriate from 2:30 to 3:30 in the afternoon, and it is best not to use medication in the morning. Because the winter and spring seasons, the greenhouse temperature is low, dew in the morning after the retreat, the photosynthesis gradually entered the peak period, if spraying will inevitably affect the temperature, reduce the photosynthetic efficiency, so the morning should not be medication. The use of medication in the afternoon will not affect the temperature, which is conducive to the prevention and treatment of diseases and insect pests. If it encounters continuous sunny weather in winter and spring, when the temperature inside the shed is high, it can also be sprayed after 4 pm, which can also play a very good sterilization effect.
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