In recent times, many vegetable farmers have reported that the empty fruits of their own plants have been seriously affected. The causes of the empty fruit and the prevention and control points are described below:
First, the cause
1. Hormone effects; Two days before flowering, in order to increase the fruit setting rate, hormone-based drugs are usually sprayed on flower buds, flower stalks, and flower buds. However, if used improperly, the fruits develop faster than normal pollination and promote early maturation. However, the placenta is often stunted, resulting in a cavity in the ovary.
The body> 2. In case of lack of light, photosynthetic products will be reduced. The supply of nutrients to the inside of the fruit will be in short supply, and empty fruit will also be formed.
3. The temperature exceeds 35 °C, and the duration is longer, resulting in accelerated fertility and metabolism of poorly fertilized or fruit development under high temperature conditions. It promotes cell division and seed maturation of the pulp tissue, which is not synchronized with the fruit growth and results in empty fruit. .
4. The large fruit-type varieties that require a large amount of fertilizers can not keep up with nutrients in the late stage of growth, resulting in less carbohydrate accumulation and empty fruit.
5. Improper watering during the fruiting period will cause the fruit peel to grow out of sync and form a hollow fruit.
Second, control methods
1. It is best to use a variety of plant species with more ventricles.
2. Do a good job of regulating temperature and light to create a good light-temperature condition for fruit development. When the nursery period encounters cloudy and low light, the temperature should be appropriately increased during the day and the temperature should be controlled at about 17°C during the night. Before and after flower bud differentiation of the first flower head, temperature adjustment should be conducted to avoid the appearance of low temperature below 10°C. In the flowering period, high temperatures above 35°C should be avoided to harm the fertilization and promote the normal development of the placenta.
3. Rational use of growth regulators. In the flowering period, the use of vibration pollination to promote flower fertilization and then spraying 15 to 20 ppm of rhein, not only can prevent flowering, but also can play a role in promoting fruit enlargement.
4. Strengthen fertilizer and water management. The use of scientific formula fertilization technology, a reasonable allocation of nitrogen, phosphorus and potassium, adjust the ratio of root to shoot, so that the plant vegetative and reproductive growth coordinated and balanced development.
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