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Northern Research Station
One Gifford Pinchot Drive
Madison, WI 53726
(608) 231-9318
(608) 231-9544 TTY/TDD

Emerald Ash Borer


[image:] Emerald ash borer initial county sightings.   Click on map to view or download larger version.Initial County finds of EAB

Emerald ash borer (eab) was initially discovered near Detroit, MI in June 2002.  Within weeks, personnel from regulatory and natural resource agencies used visual symptoms to conduct damage and delimitation surveys throughout the Upper Midwest.  On 16 July 2002, the Michigan Department of Agriculture enacted an interior quarantine of five counties (Livingston, Macomb, Oakland, Washtenaw, and Wayne).  Monroe County was added in September 2002.   The initial surveys suggested that roughly 5 to 7 million ash trees in forests, woodlots and urban settings were dead or dying as a result of eab infestation in the six-county area of southeastern Michigan. 

[image:] map showing eab locations in Illinois, Indiana, Michigan, Maryland, Ohio, Pennsylvania,West Virginia, and southwest Ontario, Canada. Click on map to view or download larger version. EAB locations

State and Federal Regulatory Agencies conduct detection surveys for eab and participate in a Cooperative Emerald Ash Borer Project.  The Cooperative Emerald Ash Borer Research Project compiles survey results and regularly updates distribution maps of eab infestations.  As of June 2009, eab has been found at many sites throughout Michigan’s Lower Peninsula, Ohio, Indiana, and Ontario, Canada.  Infestations have also been found in Virginia, Maryland, Illinois, Pennsylvania, West Virginia, Wisconsin, Minnesota, and Michigan’s Upper Peninsula.

EAB Native Range in Asia

[image:] Map of eab native range in Asia. Click on map to view larger image.EAB is native to northeastern China (Jilin, Liaoning, Heilongjiang, Inner Mongolia, Hebei, and Shandong), Korea, Mongolia, and Japan (Hokkaido, Honshu, Kyushu, Shikoku).  It is also native to the Russian Far East and Taiwan.

Last Modified: 10/18/2010