What are the methods to prevent lumpy fruit in greenhouse eggplants?
When the temperature in a solar greenhouse is too low, eggplants often develop lumpy fruit. The lumps are mainly concentrated at the front end of the fruit and appear as finger-like protrusions 0.5-1 cm high. When the fruit is broken open, it is found that in the places where the lumps have formed, there is a relatively large gap between the peel and the flesh. Causes: the greenhouse temperature is too low, especially under unusual weather conditions, when for 3 consecutive...
When the temperature in a solar greenhouse is too low, eggplants often develop lumpy fruit. The lumps are mainly concentrated at the front end of the fruit and appear as finger-like protrusions 0.5-1 cm high. When the fruit is broken open, it is found that in the places where the lumps have formed, there is a relatively large gap between the peel and the flesh.
Causes: The greenhouse temperature is too low. Especially under unusual weather conditions, when for 3 consecutive days the daytime greenhouse temperature is below 25°C and the nighttime temperature is below 15°C, root activity weakens, the nutrients absorbed cannot meet the normal growth needs of the fruit, the plant's stress resistance decreases, and lumpy fruit is likely to appear. When the weather is clear, although the outside air temperature is very low, as long as the light is good, the temperature inside the greenhouse rises quickly after the straw matting is uncovered. Because the peel is heated first, at 9-10 a.m. there is a large temperature difference between the peel and the flesh. Being in such a state for a long time inevitably makes the peel grow faster than the flesh, which can also cause lumps to form on the fruit. In addition, if the amount of gibberellin used is too large, it often causes the fruit to develop very quickly after flower treatment, and its resistance to external stress becomes worse, making lumpy fruit more likely to appear.
Preventive measures: In response to these causes, it is recommended to pay attention to the following points during management: Pay attention to greenhouse insulation, especially keeping the nighttime temperature no lower than 15°C, so as to avoid weakening root activity. On sunny days, ventilate the greenhouse 1 hour after pulling open the straw matting, giving the greenhouse a process of slow temperature rise, so as to avoid drastic temperature changes in the fruit. Pay attention to the application of foliar fertilizer. You can spray a complete-nutrient foliar fertilizer or foliar fertilizers such as chitosan that enhance the plant's stress resistance.