Sudden oak death zone line symptoms
Under the bark of infected trees, necrotic tissue surrounded by black zone lines are characteristic of sudden oak death.
Photographer(s): Joseph O'Brien, USDA Forest Service
Copyright: www.ForestryImages.org
Under the bark of infected trees, necrotic tissue surrounded by black zone lines are characteristic of sudden oak death.
Photographer(s): Joseph O'Brien, USDA Forest Service
Copyright: www.ForestryImages.org