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
Tag Archives: ash rust
Disease Hotline Issue 8
Both pictures above could be caused by Spiny witchhazel aphid or psyllids on river birch. Photos by: Nancy Gregory, Plant Diagnostician, University of Delaware.
Close-up of ash rust. Photo by: Nancy Gregory, Plant Diagnostician, University of Delaware.