White oak leaves are clustered along the end of a twig. Dead, brown spots are on the leaves due to anthracnose infection. Some leaves are curled due to these lesions.

Figure 1. Anthracnose infection causes leaf lesions as fungi kill leaf tissue. Often, these lesions start along the veins of leaves.

White oak leaves are clustered along the end of a twig. Dead, brown spots are on the leaves due to anthracnose infection. Some leaves are curled due to these lesions.

Joseph O'Brien, USDA Forest Service, Bugwood.org