Powdery mildew on crabapple and apple. Photo provided by: University of Georgia Plant Pathology Archive, University of Georgia, Bugwood.org
Oak leaf blister. Photo found at: http://www.ppdl.purdue.edu/PPDL/images/TaphrinaOak1.jpg
Cedar quince rust on a juniper twig. Photo found at: http://www.uky.edu/Ag/kpn/kpn_09/pn_090414.html
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