As the temperature drops, the humidity in the shed increases, and the cracking of vegetables in greenhouses also enters a high incidence period. The phenomenon of cleft palate is particularly prominent in the non-thorn cucumber, tomato and sweet pepper. The root cause of vegetable splitting is that the growth rate of the fruit is not synchronized with the growth rate of the peel, but there are many direct reasons, such as improper wind release, severe changes in temperature and humidity, phytotoxicity, and lack of boron, etc., to remind farmers to prevent it early.
Reasonable ventilation to avoid excessive hurricanes
At present, the weather is gradually getting colder, the temperature difference between day and night in the shed is increased, the daytime temperature is up to 30 °C, and the night temperature can be reduced to about 15 °C. The relative humidity is very large, and the fruit surface and the leaves are prone to condensation. In addition, the weather in the autumn winds is more, in the case of more fruit condensation, the wind is not properly discharged, the fruit surface water evaporates quickly, and the dry humidity changes too fast, which may cause cracks or even cracked fruit. Therefore, it must be properly ventilated.
Picking leaves in time to reduce fruit surface condensation
By timely removing the leaves around the fruit, the dew on the leaves can be reduced to the fruit surface, and the ventilation and light transmission of the lower part of the plant can be increased to reduce the occurrence of diseases.
Balance watering to avoid drying and wetting
After the vegetables enter the fruit-expanding period, according to the soil moisture of the shed, timely dressing and watering, to ensure that the dry and wet, not big water and big fertilizer, to "small water and water pouring" as well, and try to avoid uneven flooding, Prevent the occurrence of cracked fruit.
Rational spraying to avoid phytotoxicity
In the fall, pay attention to the concentration and time while paying attention to spraying and preventing diseases. If the temperature is high during spraying or the spraying time is arranged at noon, the liquid evaporates quickly, and the concentration of the drug drops remaining on the fruit surface will rapidly increase, and the peel will be easily cracked, thereby forming a cracked fruit. Therefore, the spray can be carried out after the fruit surface is exposed in the morning, and try to avoid spraying at high temperature during noon. The concentration of the drug should be reasonably mastered, and the pesticide should not be mismatched to prevent the fruit from cracking due to phytotoxicity.
Supplementing Boron and Calcium Fertilizer to Improve Fruit Resistance
The low content of calcium and boron in the soil is also likely to cause aging of the peel. It is recommended to spray the foliar fertilizer containing trace elements such as boron and calcium regularly to enhance the toughness of the peel and improve the resistance.
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