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Emerald Ash Borer Found in Broomfield, Westminster and Larimer County, CO

October 2, 2013 (Updated August 20, 2019, September 11, 2019, October 2, 2019)Emerald ash borer

While EAB was first confirmed in Boulder in September of 2013, its presence has been confirmed in the City and County of Broomfield, in the City of Westminster (Adams County) and most recently in Larimer County near Berthoud.  This insect has devastated ash trees in many midwestern and eastern states. The Colorado Department of Agriculture has posted information at this location. This pest infests only ash trees. Mountain ash are not ash trees; they belong to a different family of plants and do not develop infestations. Additional information will be posted as it becomes available.

2 Responses on “Emerald Ash Borer Found in Broomfield, Westminster and Larimer County, CO

  1. Patty Keck says:

    Has the Ash Borer come to the Denver Metro area? If we have a Mountain Ash tree, do we need to have it treated for the Ash Borer?

    1. lvernon says:

      Patty, the Emerald Ash Borer has not been found in the Denver Metro Area. EAB only attacks ash trees in the genus Fraxinus (so mountain ash are not susceptible).

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