Walnut 'bacterial blight ulcer disease' first in South Korea

Controllable with brown rot drugs The National Forest Research Institute of the Forest Service recently announced that the first domestic outbreak of “bacterial blight ulcer disease” (tentative name), which is fatal to walnuts, has been confirmed. After discovering specific symptoms in walnut farms in Paju, Gyeonggi Province, Yeongdong, Chungbuk, and Gimcheon, Yeongju, and Yeongyang in Gyeongsangbuk-do in 2016, it was confirmed that it was a new disease that had not previously occurred in Korea through a process such as bacterial isolation. Bacterial blight ulcer disease is caused by a fungus called “Xanthomonas arboricola pv juglandis”, and it damages the fruits, branches, leaves, and stems of walnuts and sputum trees. It was first discovered in 1905 in the United States and is a plant pest that is designated and managed as a managed pest in Korea. When this disease occurs, brown spots (pictured) caused by fungi appear on leaves and fruits, and symptoms appear as if pus is ...