Do your trees/forests have any of the following?

• Yellowing crowns
• Candle wax-like sap
• Fading crowns
• Browning and reddening of needles
• Frass (insect debris/excrement that looks like sawdust)
• Pale green, dense deformed twigs and foliage forming a birds nest-like growths called “witches brooms”
• Small white flecks on the underside of needles

If so, you might have one of the following...

• Mountain Pine Beetle
• Spruce Beetle
• Douglas-Fir Beetle
• Western Spruce Budworm
• Western Balsam Bark Beetle
• Dwarf Mistletoe
• Pine Needle Scale
• Twig Beetle
• Aspen issues defoliators, leaf blights, cankers or fungus

The Colorado State Forest Service has great resources on common tree insects and diseases.

Contact the Grand and Summit Office of the CSFS at 970-887-3121, or visit https:// csfs.colostate.edu/forest-management/ common-forest-insects-diseases/ for more information.