Ophiognomonia clavigignenti-juglandacearum (N.B. Nair, Kostichka & J.E. Kuntze) Broders & Boland
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The requirements to use the photos of this site are to correctly identify the disease and to properly identify the source of the photo:
USDA Forest Service - Northeastern Area Archives, USDA Forest Service, www.forestryimages.org
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