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Butternut Canker

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Butternut canker
Scientific Name:

Ophiognomonia clavigignenti-juglandacearum (Nair, Kostichka, & Kuntz) Broders & Boland (Broders and Boland 2011)


Formerly known as Sirococcus clavigignenti-juglandacearum

Common Name:

Butternut canker

Butternut canker symptoms - Photo by USDA, FS, Northeastern Area


  • USDA. Blog.

    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.

Native To:

Unknown, possibly Asia (Furnier et al. 1999)

Date of U.S. Introduction:

First detected in 1967, but may have been present before then (Farlee et al. 2010)

Means of Introduction:

Lethal disease of butternut trees (Juglans cinerea) (Farlee et al. 2010)

Current U.S. Distribution:

Northeastern and Midwestern U.S.

Distribution/Maps/Survey Status


Selected Resources

The section below contains highly relevant resources for this species, organized by source. Or, to display all related content view all resources for Butternut Canker.


European and Mediterranean Plant Protection Organization.

Invasive Species Centre (Ontario); Great Lakes Forest Alliance.

Nature Conservancy. Don't Move Firewood.
IUCN. Species Survival Commission. Invasive Species Specialist Group.
Ontario's Invading Species Awareness Program (Canada).

Federal Government

USDA. FS. Northern Research Station.

International Government

Natural Resources Canada. Canadian Forest Service.

Natural Resources Canada. Canadian Forest Service.

State and Local Government

New Hampshire Division of Forests and Lands.
Iowa Department of Natural Resources. Forestry.
See also: Forest Health Threats for more fact sheets


University of Wisconsin - Extension.

Publication XHT1142
Purdue University Extension. Forestry and Natural Resources (Indiana).
Publication FNR-421-W
See also: Forestry and Natural Resources publications
University of Vermont. Forest Pathology.


Forest Gene Conservation Association (Canada).