Emerald Ash Borer

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Emerald Ash Borer (EAB) is a non-native insect originating from Asia. This invasive pest's larvae have killed millions of Ash trees across the United States. 

EAB was found for the first time in Edina on April 13, 2018,  in a tree in the northwest section of the City. The discovery was expected because the borer has already killed trees in Minneapolis, Richfield, Bloomington and Eden Prairie.

Chemical treatments are available to help protect healthy Ash trees or those minimally affected. Application must be done every two to three years. It is imperative treatment start early, so anyone with an Ash tree on their property should contact a private arborist or tree care professional right away to evaluate their options.

If you’re unsure about the trees in your yard, here are some tips:

  • Be sure you’ve identified an Ash tree. This is an important first step since EAB only feeds on Ash trees. Ash 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. See the Ash Tree Identification guide at www.mda.state.mn.us/eab for photos and more information.
  • Look for woodpecker damage. Woodpeckers like EAB larvae and woodpecker holes may indicate the presence of EAB.
  • Check for bark cracks. EAB larvae tunneling under the bark can cause the bark to split open, revealing S-shaped or curvy tunnels underneath.
  • Contact a professional. If you feel your Ash tree may be infested with EAB, contact a tree care professional immediately.