Apple Scab—Venturia inaequalis

Apple scab is caused by a fungus which overwinters in infected dead leaves and fruit. The scab-like lesions on leaves and fruit can cause defoliation and will reduce fruit quantity and quality.

leaf showing apple scab
Olive-colored irregular lesions on sepals and leaves appear in late spring and later become gray to black and velvety in appearance.

apple showing apple scab
Roughly circular spots disfigure fruit.

apple with apple scab
An example of fruit disfigured by apple scab.

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Identification and Control Information

[Photos, left to right: University of Georgia Plant Pathology Archive, University of Georgia,; Clemson University - USDA Cooperative Extension Slide Series,; Joseph O'Brien, USDA Forest Service,]