| Problem | Publication |
William Jacobi, Colorado State University,
Bugwood.org
| Anthracnose
(Asteroma) | Shade Tree Anthracnose |
Paul Bachi, University of Kentucky Research
and Education Center, Bugwood.org
| Black Spot
(Gnomonia) | Elm Anthracnose |
William Jacobi, Colorado State University,
Bugwood.org
| Canker
(Botryosphaeria) | Canker Sampling of Trees and Woody Ornamentals |
Penn State Department of Plant Pathology & Environmental Microbiology Archives, Penn State University, Bugwood.org
| Dutch Elm Disease
(Ophiostoma) | US Forest Service Pest Alert - Dutch Elm Disease (DED) and the American Elm |
Pennsylvania Department of Conservation
and Natural Resources - Forestry , Bugwood.org
| Elm Yellows
(Phytoplasma) | US Forest Service Pest Alert - Elm Yellows |
Steven Katovich, Bugwood.org
| Aphids | Aphids |
Gerald J. Lenhard, Louisiana State
University, Bugwood.org
| Elm Leaf Beetle | Elm Leaf Beetle |
Andrew J. Boone, South Carolina Forestry
Commission, Bugwood.org
| Elm
Eriophyid Mite | Elm Eriophyid Mite |
