Solanaceous vegetables, especially tomatoes, are prone to leggy after colonization. They are characterized by thick plant stalks, large and thick leaves, thin and weak flower buds and flowers, and inconclusive results; or thin stalks, prominent stem segments, and thin and pale leaves. , Flower buds, thin flowers, falling flowers and falling fruit. Usually late-maturing varieties are easy to grow. The cause of leggy tomato plants in spring greenhouses is mainly due to excessive soil and humidity. The relative humidity is about 80%. The nitrogen fertilizer is high, or the weather is cloudy and rainy. The air humidity is often higher than 50%-60%. The light is insufficient, the planting is too dense, or the ventilation is poor. . The cultivation of peppers in the greenhouse, the first pepper can often sit, is caused by high temperature and humidity. Autumn tomatoes, the temperature is high, especially when the night temperature is high, nitrogen fertilizer is too much, there is no timely colonization and other appetite.
Control measures:
1. Vigorously control the seedling age and timely planting. Usually, the seedling age of early-maturing tomato varieties should be about 80 days, and the seedling age of mid-late-maturing varieties should be 90-100 days; the autumn tomato seedling age should be about 25 days.
2. Early preparation for colonization and promotion of seedlings. 10-30 days before planting, preparations for soil preparation, basal fertilization, covering the roof membrane of the greenhouse, and ditching drainage around the skirts and sheds shall be performed so that the humidity in the shed is lower and the temperature is higher when the seedlings are planted. .
3. Control the amount of nitrogen fertilizer. Deep sorghum cultivation is adopted to promote root growth.
4. Timely and appropriate amount of pruning leaves, scaffolding, ventilation and good ventilation, and the use of growth regulators such as tomato spirit spray, improve fruit setting, Yang Yang excessive nutrition growth.
5. After planting seedlings, the plants were sprayed every 15 days with equal amount of Bordeaux mixture or 77% of WP 500-700.
6. Timely winds. After the plants are resuscitated, they must brave enough to ventilate, drop the humidity in the greenhouse, and begin to bloom and bear fruit, and must put the bottom wind under the skirt. When the minimum temperature outside the room is not lower than 15°C at night, it should be ventilated day and night. Into the hot summer season, the plastic film can be removed as if it were cultivated in open field.
7. Control the water. The bottom of the fertilizer is sufficient, usually no watering before fertilization and fruiting, especially if it is covered with plastic film. After sitting on fruit, depending on the situation, appropriate amount of chase fertilizer and watering.
Control measures:
1. Vigorously control the seedling age and timely planting. Usually, the seedling age of early-maturing tomato varieties should be about 80 days, and the seedling age of mid-late-maturing varieties should be 90-100 days; the autumn tomato seedling age should be about 25 days.
2. Early preparation for colonization and promotion of seedlings. 10-30 days before planting, preparations for soil preparation, basal fertilization, covering the roof membrane of the greenhouse, and ditching drainage around the skirts and sheds shall be performed so that the humidity in the shed is lower and the temperature is higher when the seedlings are planted. .
3. Control the amount of nitrogen fertilizer. Deep sorghum cultivation is adopted to promote root growth.
4. Timely and appropriate amount of pruning leaves, scaffolding, ventilation and good ventilation, and the use of growth regulators such as tomato spirit spray, improve fruit setting, Yang Yang excessive nutrition growth.
5. After planting seedlings, the plants were sprayed every 15 days with equal amount of Bordeaux mixture or 77% of WP 500-700.
6. Timely winds. After the plants are resuscitated, they must brave enough to ventilate, drop the humidity in the greenhouse, and begin to bloom and bear fruit, and must put the bottom wind under the skirt. When the minimum temperature outside the room is not lower than 15°C at night, it should be ventilated day and night. Into the hot summer season, the plastic film can be removed as if it were cultivated in open field.
7. Control the water. The bottom of the fertilizer is sufficient, usually no watering before fertilization and fruiting, especially if it is covered with plastic film. After sitting on fruit, depending on the situation, appropriate amount of chase fertilizer and watering.
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