The Emerald Ash Borer (EAB) is deadly to ash trees and has been found in Boulder, Colorado in September, 2013. It has not yet been found in our area. The City will continue to monitor this situation and report the findings and recommendations of the Colorado Department of Agriculture, as we learn more. 

EAB detection is extremely difficult. Visual survey is not as useful as branch peeling; branch peeling is more accurate. If an ash tree is experiencing die back or looking unhealthy, residents are encouraged to have it examined by a professional tree company, or contact the Colorado Department of Agriculture. Infestation signs include:

  • Sparse leaves or branches in the upper part of the tree
  • D-shaped exit holes about 1/8 inch wide
  • New sprouts on the lower trunk or lower branches
  • Vertical splits in the bark
  • Winding S-shaped tunnels under the bark
  • Increased woodpecker activity

Please visit the Colorado Department of Agriculture's website for more information. 

Helpful Resources
Much of the information for this brochure was provided by the USDA Animal and Plant Health Inspection Service, the Colorado Department of Agriculture and Colorado State University Extension.

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City of Centennial
13133 East Arapahoe Road
Centennial, CO  80112

(303) 325-8000 - 24 Hour Citizen Response Center
(720) 488-0933 - Fax Number

 

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