ProblemPublication
Anthracnose (Asteroma)

William Jacobi, Colorado State University, 
Bugwood.org

Anthracnose
(Asteroma)

Shade Tree Anthracnose
Stegophora

Paul Bachi, University of Kentucky Research
and Education Center, Bugwood.org
Black Spot
(Gnomonia)
Elm Anthracnose
Canker

William Jacobi, Colorado State University,
Bugwood.org
Canker
(Botryosphaeria)
Canker Sampling of Trees and Woody Ornamentals
Dutch Elm Disease

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
Elm Yellows

Pennsylvania Department of Conservation
and Natural Resources - Forestry , Bugwood.org
Elm Yellows
(Phytoplasma)
US Forest Service Pest Alert - Elm Yellows
Aphids

Steven Katovich, Bugwood.org
AphidsAphids
Larger elm leaf beetle

Gerald J. Lenhard, Louisiana State
University, Bugwood.org
Elm Leaf BeetleElm Leaf Beetle
Eriophyid mite

Andrew J. Boone, South Carolina Forestry
Commission, Bugwood.org

Elm
Eriophyid Mite

Elm Eriophyid Mite