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.
Tag: Insects & Diseases
Report: Outbreaks of forest pests spread during warm year
March 26, 2025
The annual forest health report assesses how insects are building populations in forests across the state and changing fuel dynamics for wildfire as they leave dead and dying trees in their wake.
Piñon Ips Bark Beetle Treatment Tips
May 23, 2024
The piñon Ips beetle (Ips confusus) poses a serious threat to piñon pine trees. Learn how to identify and treat these beetles in your trees.
Report: Forest Pests, Wildfire Concerns Persist Despite Milder Conditions in 2023
March 07, 2024
The annual forest health report details the current state of the health and condition of Colorado’s forests. Learn how the milder conditions in 2023 affected wildfire risk and forest pest activity.
Ask a Forester: Are Fading Evergreen Needles Normal in the Fall?
October 11, 2023
It’s common for evergreen trees in Colorado to show some fading yellow or brown needles in October. Learn the difference between the natural shedding process and an insect infestation.
Waugh-hoo Spruce Salvage Sale
August 25, 2023
Foresters from the CSFS and the Bureau of Land Management collaborated on a plan to reduce wildfire risk for Waugh Mountain in northwestern Fremont County.
Restoring Poncha Pass: Safeguarding Communities from Wildfire
August 17, 2023
When insect outbreaks devastate an entire forest, a collaborative response helps reduce wildfire risk for residents in the wildland-urban interface
Emerald Ash Borer Confirmed on Colorado’s Western Slope for First Time
July 06, 2023
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.
Q&A with Dana Coelho, CSFS Urban and Community Forestry Program Manager
April 05, 2023
Urban and community forestry is about the relationship that we as people have with the natural world through trees where we live, work and play.
Report: Ongoing Drought Leaves Colorado’s Forests Vulnerable to Pests, Other Health Issues
February 28, 2023
The annual forest health report, released today by the Colorado State Forest Service, details how ongoing warm temperatures and below-average precipitation create challenges for Colorado’s forests.