Emerald Ash Borer

The emerald ash borer has killed more than 40 million ash trees in Michigan, Ohio, Indiana, Illinois, Maryland, Virginia, Pennsylvania, West Virginia, Missouri, Wisconsin, Minnesota, Kentucky, New York, Tennessee, Iowa, Kansas, Connecticut, Massachusetts, New Hampshire, North Carolina, Georgia, Colorado, New Jersey, Arkansas, Louisiana, Texas, Nebraska, and Delaware.
  • June 2007 - first confirmed detection in PA (Cranberry Township in Butler County and Marshall Township in Allegheny County)
  • June 2008 - found in West Middlesex, Mercer County
  • February 2009 - identified in Granville, Mifflin County
  • June 2009 - found in Allegheny Township, Westmoreland County.

Surveys conducted in Pennsylvania during the summer of 2009 also detected the emerald ash borer in Washington, Armstrong, and Indiana counties.  Juniata County was added late in 2009 to the list of Pennsylvania counties that are under an order of quarantine for the emerald ash borer. In May 2010 the emerald ash borer was detected in Bedford County.  As of mid-June 2010 a total of 12 Pennsylvania counties were under an order of quarantine for the emerald ash borer. 

The federal quarantine on the EAB and external quarantine on firewood from outside Pennsylvania are still in effect. This means it is legal to move firewood, ash, and the insect between counties inside the state, but it is not legal to move non-compliant items out of the state, nor is it legal to move non-compliant firewood into the state.


Photos of EAB damage on ash trees, the insects, and a purple panel sticky trap

News articles about Emerald Ash Borer

Web sites with more information about Emerald Ash Borer. Including the national EAB site, the Pennsylvania EAB site and other sites (Michigan, Ohio, Maryland, USDA Forest Service, Bugwood) sites.

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Restricted movement of firewood to prevent or lessen the spread of invasive pest species like EAB