What Is Emerald Ash Borer (EAB)?

Emerald ash borer (EAB) is an invasive pest that has killed millions of ash trees across the Midwest and Eastern United States over the past few years, and threatens to kill millions more as it spreads to new areas.

EAB infestations have been documented in Illinois, Indiana, Iowa, Kentucky, Maryland, Michigan, Minnesota, Missouri, New York, Ohio, Pennsylvania, Tennessee, Virginia, West Virginia and Wisconsin, with more state confirmations expected soon. See the EAB infestation map.

A joint study by the U.S. Forest Service and leading university experts projects that EAB could kill 37 million ash trees in urban landscapes by 2019 and cost homeowners and cities over $10 billion to treat or remove trees.

It is of utmost importance that homeowners and municipalities understand how to identify the pest, protect ash trees from infestation and treat trees already showing early symptoms of EAB damage.

Identifying Ash Trees

What does EAB look like?

  • EAB larva

    Dave Cappaert,
    Michigan St. Univ., Bugwood.org

  • EAB tree damage

    Joe Chamberlin,
    Valent U.S.A. LLC

  • EAB size

    Dave Cappaert,
    Michigan St. Univ., Bugwood.org

Find out more about EAB:

Additional EAB Resources:

A number of university and government agencies have pulled together excellent further information about EAB.

EAB Information - A collaborative effort of the USDA Forest Service, the Michigan Department of Agriculture, the Michigan Department of Natural Resources and USDA Animal and Plant Health Inspection Service (APHIS), as well as Michigan State University, Purdue University and Ohio State University, provides comprehensive, accurate and timely information on EAB.

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