Analysis of the Causes of Dropping of Flowers and Vegetables in Shed Room and Control Methods

If the tomato planting is serious, it will result in different degrees of production cuts. We will introduce the causes and prevention methods to everyone.

First, the reason analysis

1. Reproductive development disorders. In the process of tomato flower bud differentiation, encountering unfavorable environmental conditions leads to failure of pollination, fertilization, or incomplete pollination and fertilization of flower organs, which is the main reason for tomato drop and fruit drop. If the temperature is too high or too low and the nighttime temperature is lower than 15°C, the pollen tube will not be able to stretch or extend slowly; daytime temperatures are higher than 34°C, nighttime is higher than 20°C, or daytime temperatures reach 40°C for 4 hours, Style elongation is significantly higher than the barrel of the flower, pollen can not be scattered on the stigma, and the ovaries shrink, poor pollination led to falling flowers.

2. Extensive management. Roots are stunted, pruning is not timely; high temperature is too long, excessive consumption of nutrients; air humidity is too high or too low, are not conducive to pollen germination, causing flowering and fruit drop.

3. Insufficient light. Tomatoes are happy and sensitive to light conditions. Insufficient light, especially when exposed to continuous cloudy days, photosynthesis is inhibited, hormone secretion is reduced, carbohydrate synthesis or supply is insufficient, and the pistil atrophy or pollen vigor is reduced resulting in falling.

4. Disease effects. Tomato diseases mainly include early blight, gray mold, leaf mold, and blight. When the disease occurs, it not only damages the leaves and stems of the tomato, but also infects the flowers and fruits, causing the flowers to dry off or form fruit.

Second, control methods

1. Cultivate strong seedlings. During the nursery period, the daytime temperature is maintained at 25°C and the night temperature is 15°C to prevent the seedlings from growing or aging.

2. Temperature control after colonization. The tomato seedlings were maintained at a temperature of about 25° C. and 15° C. at night during the period of seedling cultivation. The flower buds were differentiated during the day; the results were a daytime temperature of 25° C.-26° C., a night temperature of 15° C.-17° C., and a day-night temperature of 20° C.-23° C.

3. Strengthen fertilizer and water management. Drought watered in a timely manner, the water will drain in time, and the water supply will be balanced. Small water pouring, to avoid flood irrigation, the use of formula fertilization techniques, avoid partial nitrogen fertilizer, ensure adequate nutrient supply.

4. Spray plant growth regulators. The use of somatotropin in tomatoes in the greenhouse can preserve the fruit. When flowering, it is more convenient to spray flowers or flowers with tomato seedlings, and the fruits are not prone to malformation. The specific method is: When each flower has 34 flowers open, spray it once, and do not splash the liquid on the young leaves.

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