Emerald ash borer


Emerald ash borer (EAB)

EAB Risk Status

Emerald ash borer (EAB) is a nonnative invasive insect that destroys ash trees. Quarantines have been placed in 14 counties to help slow the spread of EAB to other areas. It's against the law to move the following items out of EAB-quarantined counties:

Map of MN EAB Activities: Quarantines and Positive Finds external link


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View of woodpecher activity on ash tree.

View of woodpecher activity on ash tree.

Late winter is a good time to discover EAB infested ash by looking for woodpecker activity. Here is what to look for:

Overview of EAB winter physiology and results of some current research that may help slow the rate of population expansion, it won't be enough to stop the spread of EAB. Learn More »


photo: Signs and symptoms of EAB

What you need to know

EAB kills ash trees, and it does so in great numbers. Already it has killed millions of ash trees in North America. EAB will have a huge effect on Minnesota's landscape and the 998 million ash trees that grow in our cities and forests.

Locations of EAB


graphic:EAB icons