Now it is already in the late part of December. In the vegetable greenhouse, insulation measures have been taken for a long time, but this also causes a reduction in ventilation in the greenhouse and a certain increase in humidity. Therefore, the occurrence of diseases in this period is also relatively serious, but farmers should be based on prevention means, this is the most easy way. In addition, vegetable greenhouses should pay attention to these aspects.
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First, pay attention to the best observation time of vegetable greenhouses
In the vegetable greenhouses of this period, the humidity inside is large, which is most beneficial to the disease of the wet type. Therefore, we must pay attention to the observation of vegetable greenhouses in order to find the dynamics of vegetables at any time. If you notice that there are water-soaked spots on the leaves of the vegetables, or when mildews occur, you can be sure that the initial symptoms of the disease begin to appear. At this time, you can prevent them in advance. At this time, the effect of prevention and treatment is better. 
Second, pay attention to the best observation place of vegetable greenhouse
After entering the winter, the diseases such as downy mildew, gray mold, and blight are more common, so in the usual front of the vegetable greenhouse, the growth dynamics of the vegetable leaves can be observed. There is also the dew flowing down the vegetable shed film as much as possible to drain outside the shed, to avoid water accumulation in the front face of the shed, resulting in greater humidity, which is easy to cause disease.
Third, do a good job of disinfecting the air in the vegetable greenhouse
Air disinfection can kill them in the stage of propagation of pathogenic bacteria, especially for gray mold, downy mildew, leaf mold and other explosive types, mainly relying on airborne diseases, so the air disinfection in vegetable greenhouses is also Can try it.
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The above is the introduction of several aspects of the vegetable greenhouse in addition to preventing diseases.
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