LAND & PROPERTYCommunity DevelopmentEmerald Ash Borer   
Emerald Ash Borer

The Emerald Ash Borer (EAB) is an invasive species that has killed tens of millions of ash trees across the country. Its larvae tunnel under the bark and feeds on the part of the tree that moves nutrients up and down the trunk. 

Quarantine details 

The Minnesota Department of Agriculture has formalized a quarantine for EAB in southeast St. Louis County. The  quarantine limits the movement of firewood and ash material out of the quarantined area of the county. This will reduce the risk of further spreading the tree-killing insect.

The quarantined area runs from MN Highway 33/US Highway 53 on the west to the Lake County border on the east. The northern border of the quarantine runs from US Highway 53 along Three Lakes Road (County Highway 49) east to the intersection of Vermilion Trail. It then continues along the northern edge of Gnesen, North Star, and Alden townships. This extends south to the Carlton County/State of Wisconsin border.  


Emerald Ash Borer quarantine map


What should you know and do?

The biggest risk of spreading EAB comes from people unknowingly moving firewood or other ash products harboring larvae. There are three easy steps you can take to prevent the spread:

  • Don’t transport firewood. Buy firewood locally from approved vendors, and burn it where you buy it;
  • Be aware of the quarantine restrictions. If you live in a quarantined county, be aware of the restrictions on movement of products such as ash trees, wood chips, and firewood; and,
  • Watch your ash trees for infestation. If you think your ash tree is infested, go to and use the “Does my tree have Emerald Ash Borer?” guide.
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