Colorado State Forest Service

The mission of the Colorado State Forest Service is to achieve stewardship of Colorado's diverse forest environments for the benefit of present and future generations.

CSFS Releases Spruce Beetle Publication

The San Juan Mountains in southwestern Colorado have been heavily infested with spruce beetle. Photo: W. Ciesla
The San Juan Mountains in southwestern Colorado have been heavily infested with spruce beetle. Photo: W. Ciesla

An agent of subalpine change, the spruce beetle is a native species in Colorado's spruce forest ecosystem. Endemic populations are always present, and epidemics are a natural part of the changing forest.

There usually are long intervals between such events as insect and disease epidemics and wildfires, giving spruce forests time to regenerate. Prior to their occurrence, the potential impacts of these natural disturbances can be reduced through proactive forest management. Read more

Walnut Tree Disease Spreads to Northeastern Colorado

Thousand cankers disease is caused by a fungus carried by the walnut twig beetle. Photo: W. Ciesla
Thousand cankers disease is caused by a fungus carried by the walnut twig beetle. Photo: W. Ciesla

Thousand cankers disease, a relatively new disease to Colorado that is lethal to infested black walnut trees, has now arrived in the northeast plains.

The disease was confirmed in Fort Morgan through cooperative efforts of the Colorado State Forest Service, Colorado State University Extension, City of Fort Morgan and the CSU Plant Diagnostics Clinic, and likely arrived in the community through the movement of infested wood. Read more