The Latest Causes of Gummy Stem Blight in Cucumbers and Control Methods
Cucumber is a common vegetable in daily life and is widely grown, but during cucumber cultivation, the phenomenon of gummosis on cucumber stems and vines often occurs, causing the stems and vines to gradually wilt, until water soaking occurs. After the fruit develops gummosis, its commercial value is low, and deformed or soft rot may even appear, causing the cucumber to lose its edible value. In mild cases, yield is reduced; in severe cases, there is total crop failure, causing great harm to yield. So what causes cucumber gummosis? Follow the editor to take a look.
1. Bacterial diseases
Bacterial canker and marginal blight of cucumber are the main bacterial diseases that often cause bacterial ooze on the fruit. When the disease occurs, white flower-like bacterial ooze appears on the fruit, which does not flow easily. The wound at the ooze site is unclear, and the color is generally white. It can also cause the fruit to rot and give off a foul odor.
Control methods: Bacterial agents can be sprayed on the leaves, and at the same time, wounds on the plants must be prevented, otherwise bacterial diseases are very easy to infect. For greenhouse cultivation, the indoor temperature should be reduced. On continuous rainy days, rice husks can be spread to reduce humidity and increase the carbon dioxide content, which has a clear effect on increasing yield.
2. Fungal diseases
There are many fungal diseases that cause cucumber gummosis, including gray mold, sclerotinia rot, scab, gummy stem blight, and brown spot. Their disease symptoms all include the phenomenon of gummosis.
Control methods: The control methods for these diseases should be integrated according to their disease characteristics. First, preventive measures should be taken well, reducing field humidity and increasing ventilation. During agricultural operations, try not to leave wounds. After picking leaves and fruits, agents can be applied to prevent fungal invasion. When the disease occurs, identify the symptoms of various diseases, and then apply the right treatment.
3. Physiological diseases
Gummosis on the fruit caused by physiological diseases generally appears as fine cracks on the surface of the fruit, followed by gummosis. The main causes are: first, watering alternates between dry and wet. During the fruit harvest period, the fruit grows slowly. During long-term drought, watering should not be done, otherwise it will cause cracks in the fruit epidermis and gummosis; second, poor ventilation or sudden ventilation can also cause the cucumber epidermis to wrinkle and crack and produce gummosis; third, improper use of hormones, such as when the concentration of flower-dipping solution is too high or when a large amount of hormone fertilizer is applied, will cause the cucumber to grow rapidly in a short time, causing cracks in the epidermis and gummosis.
Control methods: Reasonable watering and ventilation are necessary conditions for the normal growth of cucumbers. When using hormones, pay attention to weather changes. On cloudy days, reduce the concentration. In addition, pay attention to the type of hormone. Cucumbers respond differently to hormones, and improper use may cause severe gummosis.
The above is an introduction to the causes and control methods of cucumber gummosis. I hope it can help you. To learn more related knowledge, please follow us.