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National Invasive Species Information Center
U.S. Department of Agriculture
  1. Home
  2. Terrestrial Invasives
  3. Terrestrial Pathogens and Diseases
  4. Alder Dieback

Alder Dieback

Scientific Name

Phytophthora ×alni (Brasier & S.A. Kirk) Husson, Ioos & Marçais (Husson et al. 2015)

Common Name

Alder dieback, alder decline

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)

Impact

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

Current U.S. Distribution

Not currently established

Phytophthora disease of alders (Alder dieback)

Phytophthora disease of alders (Alder dieback), symptoms

Credit

Photo by Andrej Kunca; Slovakia National Forest Centre

Source
Invasive.org.

Find more images

Distribution / Maps / Survey Status

Federally Regulated

  • Import Federal Orders

    • 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.

Videos

Selected Resources

The section below contains highly relevant resources for this species, organized by source.

View All Alder Dieback Resources
Partnership
International Government
Citations