Cherry leaf spot attacks the leaves, leaf stems, fruit, and fruit stems. The disease first emerges on upper sides of leaves as tiny, red to purple, circular spots. These enlarge to 1/8 to 1/4 inch in diameter and become red-brown to brown. By then, spots show brown on the undersides of leaves, and during wet periods tiny, whitish, feltlike patches appear in their centers. These contain the causal fungus spores. Some spots may drop out, leaving a shot-holed appearance. After the leaves become infected, they turn yellow and fall. The disease is most severe on leaves and may cause them to drop prematurely.