Five kinds of eggplant for winter
Anti-buds are not open. Ovary does not inflate and buds are not open, affecting pollination and fertilization. In the cold season, the fields are short of water, the air is humid, and the soil pH is above 7.5, which results in the decrease of boron's effectiveness in the soil, or excessive calcium lime in the field, which induces boron deficiency in the plants, which can cause buds to remain open for a long time. Control measures: spray borax 700 times or amino acid polypeptide pollinator on leaf surface.
Prevent fruit cracking. The fruit is not stiff and inflated, the skin is dull, and there are white stripes. After watering, it becomes cracked fruit, which is not long and of poor quality. During the fruit enlargement period, the absorption of nitrogen, potassium, and boron increased, and the relative demand of phosphorus was small. For example, if the amount of phosphorus applied was too large, the absorption of potassium and boron would be affected, and the fruits would be less meat and more rigid. Prevention and control measures: Phosphate fertilizer is mainly applied under the seedling roots during planting, and 2-3 kilograms of pure phosphorus is applied per acre at a later stage; potassium fertilizer is mainly applied during the result period.
Prevent fruit failure. The temperature of the greenhouse is too low, especially when it encounters special weather. When the greenhouse temperature is lower than 25°C for 3 days and the night temperature is lower than 15°C, the root activity is weakened. The absorbed nutrients cannot meet the normal growth requirements of the fruit, and the plant's resistance to stress is reduced. , easy to appear fruit. Prevention measures: Pay attention to the greenhouse insulation, especially keep the night temperature no lower than 15°C, so as to avoid the deterioration of the root activity. On sunny days, after releasing the grasshopper, let it be released again one hour later and give the greenhouse a warming-up process to avoid drastic changes in temperature.
Anti-drop and fruit drop. With a 2,4-D dilution, 1-2 days before and after flowering, use a brush to decorate, apply a flower stalk, or immerse the bud in the diluted solution for 2-3 seconds and remove it. It is more effective to add gibberellin to the 2,4-D solution.
Verticillium wilt. At the early stage of disease, 75% chlorothalonil WP can be used as 600 times solution, 50% thiophanate WP can be used 500 times, or 50% DT WP can be used as a 350 times solution. Liquid 0.5 liters, irrigation once every 7-10 days, even irrigation twice.
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