The time of occurrence distinguishes the basic conditions of the flow of kiwifruit. The daily average temperature is close to 10°C and the tree is germinating. However, ulcer disease begins to expand in the spring when the average temperature is around 0°C. In the general case, the ulcer disease in spring occurs before the injury and earlier than the injury.
The lesions are not the same as those in the ulcers: they appear in areas where there are no obvious wounds, such as buds, stomata, petiole, fruit stalk, and graft interface. The yellowish-white viscous sap has just flowed out and there is no clear water-like juice. As the temperature rises, the yellow The white color gradually turns into rust-red, dark-brown and other colors, and the most typical ulcer disease is infected with brown skin. Injury flow: There are many cuts appearing, there are water-like droplets, there are foamy yellow, orange or red and white mucus, but the head of the droplets have clear water, and then severe blisters will not blanch blisters.
Symptoms are different. Injury flow is a clear watery sap without concentration. After the onset of ulcer disease, the sensation in the sensation site is concentrated. The milky white mucus that flows out in the initial stage gradually oxidizes with time to become yellow-red mucus. Become rusty red mucus.
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