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 medicine. The medicine is usually before 3 pm. You can choose to spray Amisida, Jianda, Kairun, Powder Rust, etc., scientific and reasonable rotation medication. It is easy to increase the humidity in the shed during rainy or rainy weather, so it is also possible to apply aerosols. The choice of aerosols is propolis, sclerotherapy and chlorothalonil. When applying, be sure to compact the surrounding area of ​​the shed film, ignite after compaction, and determine the dosage according to the size of the shed, and then evacuate the person, usually after 12 hours.
Need to pay attention to the insulation problem in the shed. Because vegetable farmers often want to increase the temperature inside the shed by sealing the shed, they should still be properly ventilated according to the growth of the vegetables. The temperature is high, the sun is full, the air is ventilated early, the wind is closed late; the temperature is low, it is cloudy, and it is ventilated and closed early.
Do a good job in the shed
Rainy weather will not ventilate the greenhouse, but in general, the greenhouse can not be ventilated for more than 3 days. In snowy 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 to ventilate 2-3 days after the closure, the best time is from 10 am to 2 pm. First pass the leeward, then pass the wind, in the case of conditions, first pass the small wind, and then gradually increase, this can prevent flash seedlings.
Management of seedbed
The most important thing in the nursery process is the temperature problem. It is recommended that there be a 2-3 layer of shed film in the shed and increase it appropriately according to the outside temperature. If the outside temperature is below 5 ° C, then in addition to the 2-3 layer of shed film, it is necessary to increase the cover.
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