Insects and diseases can pose serious threats to a forest’s health. Our foresters monitor insect and disease activity and trends, and respond to emerging threats to our communities’ forests.

Common Insect & Disease Concerns

If your questions cannot be resolved with the information provided, please contact the Granby Field Office.

Foresters are available for site visits to look at specific insect or disease concerns on your property.





Piñon Pine


The 2018 Report on the Health of Colorado’s Forests (2.1 MB PDF) provides an overview of insect and disease conditions in all of the state’s forests.

2018 Insect & Disease Activity in Colorado Forests

Click the image to view at a larger size

Forest Insect & Disease Aerial Survey

CSFS Forest Entomologist Dr. Dan West has produced an Esri Story Map for the 2018 Forest Health Report, which tells the story of how data was collected to compile the report, and offers users an interactive way to find out about forest conditions in their area.

Use your cursor to zoom in/out and navigate around the map to display Eagle, Grand and Summit county information.