Emerald Ash Borer

Hennepin County, which includes all of Minnetrista, is part of the Minnesota Department of Agriculture quarantine area, which restricts wood from being removed from the county. A quarantine is a temporary rule intended to help prevent a potentially dangerous or destructive pest or disease organism from spreading outside a known infested areas into new areas. 

What is Emerald Ash Borer?

EAB is one of America’s most destructive tree pests.  Its larvae kill ash trees by tunneling into the wood and feeding on the tree’s nutrients. Since its accidental introduction into North America, EAB has killed tens of millions of ash trees in 35 states. Infestation signs include one-eighth inch, D-shaped exit holes in ash tree bark and winding tunnels under the bark. The biggest risk of spreading EAB comes from people unknowingly moving firewood or other ash products harboring larvae. 

There are three easy steps Minnesotans can take to keep EAB from spreading:

  1. Don't transport firewood. Buy and burn local firewood to prevent the spread of EAB. This is the single most important action you can take to help prevent the spread of EAB.
  2. Be aware of quarantine restrictions. If you live in a quarantined county, be aware of the restrictions on the movement of products such as ash trees, wood chips, and firewood. Details can be found online.
  3. Watch your ash trees for infestation. If you think your ash tree is infested, go to mda.state.mn.us and use the Does my Tree Have Emerald Ash Borer) checklist or call Minnesota Department of Agriculture (MDA) at 888-545-6684 to report concerns.
  4. After you have reported to the MDA, call City of Minnetrista at 952-446-1660 or email minnetrista@ci.minnetrista.mn.us to report the infestation.

As a homeowner it is important for you to:

1. Identify if you have ash trees on your property. This is an important first step since EAB only feeds on ash trees. Ashes have opposite branching – meaning branches come off the trunk directly across from each other. On older trees, the bark is in a tight, diamond-shaped pattern. Younger trees have a relatively smooth bark.

2. Look for signs of EAB. When trees begin to leaf out is the perfect time to look for signs of EAB. Woodpeckers like EAB larvae so woodpecker holes may indicate the presence of EAB. Also check for cracks in the bark; EAB larvae tunnel under the bark which can cause the bark to split open, revealing the s-shaped tunnels underneath.

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