Anthracnose on maple

Anthracnose can cause large dark-brown blotches along the veins and between them; and leaves can be puckered or deformed. Anthracnose infections are common on lower limbs and on branches close to the trunk so that from a distance the trees look like the lower and inner branches have fewer and smaller leaves than the outer and upper branches. Photo; Paul Bachi, University of Kentucky Research and Education Center, anthracnose Discula spp. maple Acer spp.