One, cloudy snow cover as soon as possible to cover the early ventilation. During the day in cloudy snow, you must uncover the light, you must cover the curtain at night, and cover the cold film outside the curtain. After sunny days of continuous snowfall, it must be shaded and not ventilated to allow the temperature of the greenhouse to rise slowly. If the temperature rises too fast, the plants can easily become wilted. When the temperature in the shed is too low, it can be heated in an iron stove to raise the temperature and prevent freezing.

Second, disease prevention and control. After cloudy snow days, tomatoes in greenhouses are prone to diseases, and spraying and disease prevention are required. During the spraying process, 25 grams of urea and 20 grams of potassium dihydrogen phosphate were added to each barrel to supplement nutrients to the tomato. The key to disease prevention is “prevention”, which is mainly to remove pathogens and reduce the source of pathogens. Generally, after continuous cloudy winter days, vegetables are prone to onset, so it is necessary to look at the weather forecast and spray it before cloudy snow days for prevention. When it is found that pests and diseases have occurred, they should remove the diseased leaves and fruit in time and use drugs for prevention and treatment in time.

Kegel Ball

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