Powdery mildew on Coreopsis.
Powdery mildew on dogwood. Photos for powdery mildew are from Bob Mulrooney, University of Delaware.
Photos for anthracnose on ash and Dutch elm disease have previously been posted. Please use the search function to locate these images.
Dutch elm disease from a distance. Photo provided by: William M. Brown Jr., United States, Bugwood.org
Vascular streaking in affected wood. Photo provided by: Paul H. Peacher, USDA Forest Service, Bugwood.org
Galleries of European elm bark beetle and affected wood. Photo provided by: William M. Brown Jr., United States, Bugwood.org
Dutch elm disease. Photo provided by: William Jacobi, Colorado State University, Bugwood.org
Damage caused by hawthorn leaf miner. Photo provided by: Whitney Cranshaw, Colorado State University, Bugwood.org
Ash rust. Photo provided by: Edward L. Barnard, Florida Department of Agriculture and Consumer Services, Bugwood.org
Black spot on rose. Photo provided by: Division of Plant Industry Archive, Florida Department of Agriculture and Consumer Services, Bugwood.org
Dutch elm disease early stage symptoms. Photo provided by: Joseph O’Brien, USDA Forest Service, Bugwood.org
Dutch elm disease. Photo provided by: William Jacobi, Colorado State University, Bugwood.org
Symptoms of Dutch elm disease. Photo provided by: Fabio Stergulc, Università di Udine, Bugwood.org
Streaking of Dutch elm disease. Photo provided by: Paul H. Peacher, USDA Forest Service, Bugwood.org
Dutch elm disease fruiting bodies. Photo provided by: William Jacobi, Colorado State University, Bugwood.org
Dutch Elm disease. Photo by: William M. Brown Jr., Bugwood.org
Vascular staining by fungus. Photo by: Paul H. Peacher, USDA Forest Service, Bugwood.org.
Powdery mildew on roses. Photo by Bob Mulrooney, Plant Pathologist, University of Delaware.
Powdery Mildew on common lilac. Photo by: Whitney Cranshaw, Colorado State University, Bugwood.org.
Frog-eye leaf spot on red maple. Photo by Bob Mulrooney, Plant Pathologist, University of Delaware.