Tomato cavity fruit is a physiological disease, mainly characterized by poor steric development of the placenta, separation of the rind from the placenta tissue, less flesh, empty cavity of the seed cavity, ribs on the surface of the fruit, larger body, but lighter weight, juice It tastes light. Cheng Zhihui, a professor at the College of Horticulture of Northwest A&F University, believes that tomato cavity fruit has a certain impact on fruit yield and quality, and it is important to prevent tomato cavity fruit from occurring in spring.
cause
Improper selection of varieties Generally, the number of ventricular chambers of early-maturing varieties is small, and voids are prone to occur. The number of medullas in late-maturing varieties is large, which can prevent the occurrence of hollow fruits. When the same variety was cultivated in the greenhouse, the rate of tomato cavity fruit was high during wintering and early spring cultivation; the fruit rate of tomato in autumn and winter and late spring was low.
Bad weather affects the tomato after flowering and fruit setting, if it encounters continuous rain and snow, the light is insufficient, the photosynthetic product is reduced, and the nutrient supply inside the fruit is insufficient, resulting in the inconsistency of the growth of the skin and the growth of the flesh, which is easy to form a hollow fruit.
If the fertilizer and water management are not properly placed, the watering and topdressing will be too much, the vegetative growth will be too strong, or the growth and the late stage will not keep up with the fat and water in the final stage, which will lead to the formation of empty fruit.
Improper application of growth hormone sprayed hormones two days before flowering, rapid development of the skin, and poor development of the placenta, resulting in the formation of voids in the sub-house close to the skin. The concentration of the fruit hormone used in the snow or in the snowy weather will also cause empty fruit.
Prevention
It is generally advisable to choose large-fruit varieties with medium and late maturity in the selection of suitable varieties. The number of ventricles in large fruit-type varieties is large, and there are many wall partitions within the fruit. It is not suitable to produce hollow fruits, such as Maofen 802 and Jiafen No.15.
Improving environmental conditions Adjusting the lighting and temperature of winter greenhouses is an important condition for ensuring the good development of fruits. It is necessary to uncover the grass curtains in time according to the weather changes, to control the temperature of the light, and to take measures such as warming and light supplementing to create fruit growth and development. Suitable conditions. Generally, the temperature in the greenhouse is 20 to 27 ° C, and the night temperature is 8 to 14 ° C. The time of receiving light and scattered light during the day is not shorter than 6 hours, which can effectively prevent the occurrence of tomato cavity fruit.
Strengthen the management of fertilizer and water. Formulated fertilization technology is adopted in the use of fertilizers, and organic fertilizer is added. The chemical fertilizers should be reasonably matched with nitrogen, phosphorus and potassium. At the same time, watering and interval days should be determined according to different growth periods and soil moisture to ensure water supply.
Proper use of plant growth regulators The proper use of plant growth regulator concentrations and time helps to prevent voiding.
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