What's New?

Listen to Les discuss Forestry with J.D. on KFBC radio during a live interview on April 29th, 2015

Emerald Ash Borer Discovery In Colorado Prompts Emergency Tree Quarantine.

Emerald ash borer has been confirmed for the first time in Colorado. This insect has not been detected in Wyoming.




Major forest agents-of-change in Wyoming are mountain pine beetle, Douglas-fir beetle, and spruce beetle.  Since the early 1990s, these three native bark beetles have caused tree mortality over an estimated three million acres of federal, state, and private forests in Wyoming.

We provide site-specific forest management advice to private forest landowners, municipalities, and local government land managers.  Aerial reconnaissance and ground surveys play a pivotal role by identifying agents-of-change as well as their effects on forest cover types.

The 2015 survey will commence in early August.

The most significant invasive agent affecting Wyoming’s forests is white pine blister rust which is established in limber pine forests statewide.  Other invasive species that nationally pose a threat but are not currently established in Wyoming are emerald ash borer, gypsy moth, and thousand cankers disease.

Les Koch
Forest Health Specialist
Wyoming State Forestry Division
5500 Bishop Blvd.
Cheyenne, WY  82002
307-777-5495