Fog days are often accompanied by low temperatures, high humidity, and low sunshine, which are extremely detrimental to the growth of greenhouse vegetables and are prone to induce various pests and diseases. We must strengthen management.
1. The fog should be properly increased to prevent the vegetables from freezing. Continual overcast and foggy days after a sunny day, after removing the cover, pay attention to observing the changes of the seedlings, find the wilting, and immediately cover it. After the seedlings are recovered, they shall be reopened and covered with wilting. Such repeated, after 2-3 days, Transfer to normal management.
2. If the temperature inside the shed continues to drop, perform manual heating.
3. In the fog, generally do not water, to prevent injury. If the humidity in the booth is too large, promptly ventilate and drain it; if it cannot be ventilated, weeds can be used to soak moisture in the rows or in fine dry soil.
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