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Emerald Ash Borer

Emerald ash borer (EAB), Agrilus planipennis Fairmaire, is an exotic beetle that was discovered in southeastern Michigan near Detroit in the summer of 2002. The adult beetles nibble on ash foliage but cause little damage. The larvae (the immature stage) feed on the inner bark of ash trees, disrupting the tree's ability to transport water and nutrients. Emerald ash borer probably arrived in the United States on solid wood packing material carried in cargo ships or airplanes originating in its native Asia. Emerald ash borer is also established in Windsor, Ontario, was found in Ohio in 2003, northern Indiana in 2004, northern Illinois and Maryland in 2006, western Pennsylvania and West Virginia in 2007, Wisconsin, Missouri and Virginia in the summer of 2008, Minnesota, New York, Kentucky in the spring of 2009, Iowa in the spring of 2010, Tennessee in the summer of 2010, Connecticut, Kansas, and Massachusetts in the summer of 2012, New Hampshire in the spring of 2013, North Carolina and Georgia in the summer of 2013, Colorado in the fall of 2013, New Jersey in the spring of 2014, Arkansas in the summer of 2014, Louisiana in the winter of 2015, Texas in the spring of 2016, Nebraska and Delaware in the summer of 2016, and Oklahoma and Alabama in Fall 2016. Since its discovery, EAB has:

  • Killed hundreds of millions of ash trees in North America.
  • Caused regulatory agencies and the USDA to enforce quarantines and fines to prevent potentially infested ash trees, logs or hardwood firewood from moving out of areas where EAB occurs.
  • Cost municipalities, property owners, nursery operators and forest products industries hundreds of millions of dollars.

Recommended Resources

Initial county EAB detections in North America

PDF Map of EAB Locations
As of August 1, 2017
Click to enlarge

Changes/additions included since the July 5, 2017 map are as follows:

The addition of initial county detections in:

  • Ringgold County, IA
  • Ouachita Parish, LA
  • MO
    • Cecil County
    • Crawford County
  • NJ
    • Morris County
    • Sussex County
    • Warren County

Added to the list of Canadian initial county detections:

  • Quebec City, QC

New York has expanded their state quarantine

Click here for more information.

EAB University

EAB University

Head back to school to learn the latest about what is being done to address emerald ash borer and other invasive species in North America.

The 2017 Spring session has been posted!

Important Information

Science and Management of Ash Forests After EAB

A Workshop on the Future of Ash Forests
July 25 - 27, 2017
Duluth, MN, USA
The Inn on Lake Superior

Join managers, land owners, and researchers for presentations, field tours, and posters aimed at the expected changes from the loss of ash and management options for resilient ecosystems.

Topics will include silvicultural approaches, options for species transition, hydrologic changes, plant community response, biogeochemistry, and more!

Science and Management of Ash Forests After EAB

Insecticide Options for Protecting Ash Trees
June 2014 - Second Edition

Insecticide Options for Protecting Ash Trees cover

Many homeowners, arborists and tree care professionals want to protect valuable ash trees from EAB. Scientists have learned much about this insect and methods to protect ash trees since 2002. This bulletin is designed to answer frequently asked questions and provide the most current information on insecticide options for controlling EAB.

Coalition for Urban Ash Tree Conservation EAB Management Statement

This document is an endorsement for ash tree conservation as part of integrated approach to managing emerald ash borer in urban areas, and is supported by university scientists with expertise in EAB management, commercial arborists, municipal foresters, public works officials, and non-governmental organizations (NGOs).

Additional Letters of Support

What To Know About EAB

adult eab
Adult Beetles are metallic green and about 1/2-inch long.
It attacks only ash trees (Fraxinus spp.)
d-shaped exit hole
Adults leave a D-shaped exit hole in the bark when they emerge in spring.
Woodpeckers like EAB larvae; heavy woodpecker damage on ash trees may be a sign of infestation.
Firewood cannot be moved in many areas because of the EAB quarantine.
packing crate
It probably came from Asia in wood packing material.

News & Information

Get the most current information about emerald ash borer from our popular EAB University webinars or follow us on Twitter for the latest news about EAB.

EAB University

Emerald Ash Borer University

The Spring 2017 EAB University line-up of webinars has been posted!


Check Out The 2017 Spring Webinars