Crabapple scab. Photo found at: http://www.ipm.iastate.edu/ipm/hortnews/files/images/Apple%20scab.preview.jpg
Botryosphaeria canker. Photo provided by: University of Georgia Plant Pathology Archive, University of Georgia, Bugwood.org
Black spot on roses. Photo provided by: Yuan-Min Shen, Taichung District Agricultural Research and Extension Station, Bugwood.org