Ophiostoma ulmi (Buisman) Nannf. and Ophiostoma novo-ulmi Brasier (ITIS)
Dutch elm disease (DED)
Unknown, possibly Asia (Brasier et al. 2001)
First discovered in the U.S. during the 1930s (Olson et al.)
Introduced accidentally on diseased logs imported from Europe (Flores 2006)
Lethal fungal disease of elm trees (particularly American elms (Ulmus americana), which are more susceptible to the disease than other elm species) (Olson et al.)
Humans adores trees. But humans also migrate and trade, habits that led to the accidental introduction of insects and diseases that harm trees and alter the landscape. Examples are easy to find and may be outside your front door: American elms that once dotted streets across America succumbed to Dutch elm disease. Now all colors of ash species – black, green, white, pumpkin, and blue – are threatened by emerald ash borer. The already uncommon butternut tree, also known as white walnut, faces the possibility of extinction from a mysterious attacker. Many invasive insects and fungi come from regions where native trees have evolved to resist their attacks. When these species enter the United States, they find trees that lack this resistance. There's no immediate end to this dismal pipeline, but there is hope on the horizon.
Distribution / Maps / Survey Status
USDA. FS. Northern Research Station.
Select the non-indigenous forest pest to view maps depicting state and county distribution. Produced by: USDA, FS, Forest Health Protection, and its partners.
The section below contains highly relevant resources for this species, organized by source. Or, to display all related content view all resources for Dutch Elm Disease.
Council or Task Force
Alberta Invasive Species Council (Canada).
See also: Fact Sheets for more information about individual invasive species, including those listed as "Prohibited Noxious" and "Noxious" under the Alberta Weed Control Act
Ontario's Invading Species Awareness Program (Canada).
State and Local Government
Iowa State University. Extension and Outreach.
Utah State University Extension; Utah Plant Pest Diagnostic Laboratory.
Michigan State University. Integrated Pest Management Program.
See also: IPM Scouting in Woody Landscape Plants for more pests and diseases
Oklahoma State University. Oklahoma Cooperative Extension Service.
Missouri Botanical Garden.
Morton Arboretum (Illinois).
Brasier, C. M., and K. W. Buck. 2001. Rapid evolutionary changes in a globally invading fungal pathogen. Biological Invasions 3:223-233.
Flores, A. 2006. Dutch elm disease update.Agricultural Research 54(6):18.
Integrated Taxonomic Information System. Ophiostoma spp. [Accessed Sep 10, 2014].
Olson, B., S. von Broembsen, and T. Royer. Dutch Elm Disease and Its Control. Oklahoma Cooperative Extension Service. EPP-7602.