A serious fungal disease that creates BB sized holes in leaves, rough areas on fruit and concentric lesions on branches. During summer, infected leaves become chlorotic (yellow) and drop prematurely, often leaving the tree completely defoliated before fall in extremely wet years. Early defoliation impacts desired appearance and reduces flowering. Successive years of infection can reduce overall vitality, leading to other problems such as borer attacks, winter injury, and sunscald of the trunk.