At present, there are mainly powdery mildew, gray mold, downy mildew and other diseases in the shed. The first recommendation is to prevent it by spraying pesticides. It is usually before 3 pm. Can choose to spray Amisida, Kinta, Kai Run, rust, etc., scientific and rational rotation medication. It is easy to increase the humidity in the shed during the rainy or rainy or snowy weather, so it is also possible to use aerosols. The choices of aerosols include procymidone, sicillin and chlorothalonil. When the application must be compacted around the shed film, ignited after compaction, and according to the size of the shed to determine the amount, and later evacuation, usually after 12 hours and then ventilated. The second is to pay attention to the insulation of the shed. Because vegetable farmers often want to increase the temperature inside the greenhouse through enclosure, they should be properly ventilated according to the growing trend of vegetables. The temperature is high, the sunlight is sufficient, and the air is closed early and closed in the evening; the temperature is low, and it is a cloudy day. The ventilation is late and the air is closed early. Good ventilation in the shed Rainy weather will not ventilate greenhouses, but in general, greenhouses cannot be ventilated for no more than three days. In the snow or rainy days, not ventilating for more than 3 days will not be conducive to the growth of crops in the shed, so it is recommended that ventilation must be carried out after 2-3 days of enclosure. The best time is from 10 am to 2 pm. First pass the leeward, and then pass the wind, under the conditions, the first small wind, and then gradually increase, so as to prevent flash seedlings. Seed management In the nursery process, the most important issue is temperature. It is advisable to have 2-3 layers of film in the shed and increase it appropriately according to the outside temperature. If the outside temperature is below 5°C, cover is added in addition to 2-3 layers of film.
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Disease Management of Vegetables in Winter Shed