Pyrimethanil is a new and highly efficient anilinopyrimidine pesticide fungicide with novel structure and unique mechanism of action. It inhibits the infection of pathogenic bacteria, prevents the infection of pathogens and kills the pathogens, and is a variety of crops of gray mold. Disease, leaf mold, brown spot, disease, scab, sclerotinia, and spotted leaf disease have good therapeutic effects. The following describes the use of pyrimethanil to prevent vegetable frost.
First, the plastic arch shed to prevent frost measures:
1. Add anti-freeze curtains (hanging around the arch shed) in the plastic arch shed just planted at the seedling stage, or cover the small arch shed in the large arch shed; or directly cover the mulch on the plant; or 5 pm every day In the future, the seedlings will be buckled with plastic nutrition pots, pots, mud bowls, etc., to keep warm and prevent frost. After 9:00 am, the temperature gradually rose and the cover was gradually removed.
2. Irrigation is carried out in a plastic arch shed that has just been planted at the seedling stage. The amount of water is preferably half-ditch, which increases the humidity inside the shed.
3. For the plastic arch shed that has not yet been planted, the heat preservation is mainly used. When the weather is fine and there is no frost in the near future, the temperature in the shed is stable above 14 °C, and the seedlings are planted in the sunny morning.
4. In the plastic arch shed where the seedlings are planted, ignite the bacteriological agents such as chlorothalonil , procymidone and pyrimethanil at 4:5 am, to prevent disease, increase temperature and dehumidification, and use 200 g to 250 g per mu. .
Second, the solar greenhouse prevention frost measures:
1. Energy-saving solar greenhouse should do a good job of heat preservation, insist on early cover and cover the grass, and close the air outlet in time to ensure the appropriate temperature for plant growth.
2. The nursery greenhouse will strengthen the insulation and warming measures, and protect the seedlings that are ready to be planted in the near future to prevent aging.
3. Evaporate chlorothalonil, procymidone, pyrimethanil and other aerosols in the solar greenhouse to prevent disease, increase temperature and reduce humidity. Immerse the smoke after the grass cover in the evening, 200-250 grams per mu. When in use, the aerosol is evenly placed on the aisle at the back of the greenhouse, and is ignited sequentially from the inside to the outside. After the second day of ventilation, it can enter the shed.
4. Snowfall (rain) or cloudy daylights should be uncovered to allow the vegetables to receive scattered light. Snowfall (rain) makes snow (rain) fall directly on the shed film, preventing snow (rain) from falling on the grass to increase weight and causing the shed to collapse.
Third, the management of facility agriculture after frost weather
1. After the frost is low and the cloudy sky suddenly turns clear, the plastic arch shed should be cooled in time to prevent high temperature plants from snoring.
2. After the cloudy day suddenly turns clear, the solar greenhouse adopts a method of placing half a sputum and releasing flowers to avoid the sudden rise of temperature to cause the plants to snoring, and then all the plants are re-opened after the plants resume growth.
3. Spray water or 0.2% aqueous urea solution or 0.2% potassium dihydrogen phosphate solution in time to increase the resistance of the plants.
The use of pyrimethanil to control vegetable frosts, and other pesticides sprayed and used, can produce better results. Finally, I hope that the three places mentioned above can help the majority of farmers. To learn more about the use characteristics and precautions of pyrimethanil, please visit the Qingdao Baiheyuan website.
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