
Emerald ash borer now detected in more than 20 Front Range cities
First detected in Boulder in 2013, this invasive, tree-killing beetle threatens thousands of Colorado’s ash trees.

First detected in Boulder in 2013, this invasive, tree-killing beetle threatens thousands of Colorado’s ash trees.

In June 2023, experts from Colorado State University confirmed the presence of emerald ash borer (EAB) in two new towns in Colorado: Carbondale and Littleton.

Experts from Colorado State University Extension confirmed the presence of emerald ash borer (EAB) in the City of Thornton in June 2022. This is the first confirmation of EAB in a Colorado city east of I-25.