Emerald Ash Borer

Emerald Ash Borer (EAB) was recently found in the City of Boulder on Sept. 23, 2013, by City of Boulder Forestry Staff. EAB is a non-native, wood-boring beetle that can attack all native ash (Fraxinus) tree species. The Emerald Ash Borer is a state- and federally-regulated invasive pest and is responsible for the death of tens of millions of ash trees in 21 states. Unfortunately, this is the first time that EAB has been detected in the state of Colorado. Boulder County will be working with the city of Boulder, adjacent communities and the Department of Agriculture to ensure consistency and coordination of any communications and policy decisions.

Emerald Ash Borer Identification and Management Resources

Quarantine of Wood Products

  • The Colorado Department of Agriculture has established an emergency quarantine in the Boulder County area related to the recent discovery of the Emerald Ash Borer (EAB). The quarantine is effective immediately.
  • The quarantine prohibits the sale and/or movement of all plants and plant parts of the genus Fraxinus, ash. For specifics on the quarantine boundaries and implications, please see www.eabcolorado.com.

If you have further questions about EAB please contact the CSU Extension in Longmont at 303-678-6238 or EAB@BoulderCounty.org.

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Mailing Address

Forest Health
Boulder County Land Use
PO Box 471
Boulder, CO 80306

Property Owner &
Private Land Issues

Carol O’Meara
Extension Agent,
Horticulture Entomology
Parks and Open Space/
CSU Extension

County Managed
Open Space Lands

Cathy Thiltgen 
Parks and Open Space