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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, and Louisiana in the winter of 2015. Since its discovery, EAB has:

Popular Documents

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
Upcoming Schedule


Setting EAB Management Priorities in Maryland
Ann Hairston Strang, Maryland Department of Natural Resources Forest Service
Thursday, February 11, 2016 at 11am ET

View webinar on February 11


Staging an Urban EAB Infestation to Improve Protection and Planning Efforts
Cliff Sadof, Department of Entomology, Purdue University
Thursday, February 25, 2016 at 11am ET

View webinar on February 25


EAB Preparedness and the Early Years in Colorado
Kathleen Alexander, Boulder City Forester and Rob Davis Denver City Forester
Thursday, March 10, 2016 at 11am ET

View webinar on March 10


Update of EAB Woodland Population and Damage Dynamics
Kathleen Knight, USDA Forest Service Northern Research Station
Thursday, March 24, 2016 at 11am ET

View webinar on March 24


Is Firewood Still a Vector of Invasives? A Case study of Firewood Movement Through the New Hampshire Speedway
Piera Siegert, State Entomologist, New Hampshire Division of Plant Industry, Department of Agriculture
Thursday, April 14, 2016 at 11am ET

View webinar on April 14


Watch previous EAB University webinars