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Emerald Ash Borer

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What is EmeraEmerald Ash Borerld Ash Borer*?
Emerald Ash Borer is an insect responsible for the destruction of millions ash trees throughout the United States.  In 2013, Emerald Ash Borer was confirmed in Colorado in the city of Boulder and was recently confirmed in the cities of Broomfield and Westminster.  Ash trees comprise approximately 15% of Colorado's urban forest.  It is estimated that there are 22,600 ash trees in the City of Englewood.   

Not sure if you have an ash tree?*Trees-Ash-Green

Ash trees have the following characteristics:

  • Leaves are compound, meaning multiple leaflets occur on a common stalk and typically include five to nine leaflets.
  • Leaflets are smooth or finely toothed along the edges
  • Seeds on female trees are paddle shaped
  • Branches and buds grow in pairs, directly opposite from each other.
  • Mature bark displays diamond-shaped ridges.

Go to the following app to help identify if you have an ash tree:  EAB/Ash Tree ID   

What you can do as a homeowner:

  • Don't move firewood.  Removed ash wood can be used for firewood or mulch at the removal site.  However, the wood should not be transported to other locations due to the high risk of spreading Emerald Ash Borer to healthy trees.  

Additional resources:

August 2019 News Release - EAB detected in Broomfield
Emerald Ash Borer Quick Guide

*Information provided by the Colorado State Forest Service

More information on the Emerald Ash Borer can be found on the links below:

Colorado Department of Agriculture

Colorado State Forest Service