Oak leaf blister. Photo by Michael Kangas, NDSU - North Dakota Forest Service, Bugwood.org
Powdery mildew on Phlox leaf. Photo from Division of Plant Industry Archive, Florida Department of Agriculture and Consumer Services, Bugwood.org
Cedar-Quince rust on Hawthorn. Photo from the Purdue University Plant Diagnostic Lab.
Cedar-Quince rust on Hawthorn twig. Photo from the Purdue University Plant Diagnostic Lab.
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