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Alder Dieback

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Phytophthora disease of alders (Alder dieback)
Scientific Name:

Phytophthora alni Brasier and Kirk (Brasier et al. 2004)

Common Name:
Alder dieback, alder decline
Phytophthora disease of alders (Alder dieback), symptoms - Photo by Andrej Kunca; Slovakia National Forest Centre
Native To:

First identified in Europe (Aguayo et al. 2013)

Date of U.S. Introduction:

Not introduced

Means of Introduction:

European introductions occurred through infected nursery stock (Adams et al. 2008)


Infects and kills alder trees (trees of the genus Alnus) (Gibbs et al. 1999)

Current U.S. Distribution:
Not currently established

Distribution/Maps/Survey Status


  • USDA. APHIS. Plant Protection and Quarantine.

    A Federal Order is a legal document issued in response to an emergency when the Administrator of APHIS considers it necessary to take regulatory action to protect agriculture or prevent the entry and establishment into the United States of a pest or disease. Federal Orders are effective immediately and contain the specific regulatory requirements.


Selected Resources

The section below contains selected highly relevant resources for this species, organized by source. To view all related content for this species, click on "View all resources for species" in the top left of this page.


Nature Conservancy. Don't Move Firewood.

International Government

Forestry Commission (United Kindom). Forest Research.