Because the greenhouse is relatively confined and the humidity is relatively high, it is easy to produce a variety of pests and diseases. Therefore, prevention should be the main method and there should be no thought of remedying the disease. In general, a true leaf of a cucumber begins to spray once every 4-5 days, up to a maximum of 7 days, especially before watering. It is generally used in fungicides such as chlorothalonil, mancozeb, and DuPont Kelu to create better economic benefits.
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