10/19/2026
IS YOUR ASH TREE UNDER ATTACK?
The Emerald Ash Borer (EAB) is a destructive, invasive insect that attacks ash trees. Early detection is important, but infestations can be difficult to recognize until damage is already underway.
Watch for these warning signs:
- D-shaped exit holes in the bark
- S-shaped tunnels beneath the bark, created by feeding larvae
- Increased woodpecker activity as birds search for insect larvae
- Bark splitting or sections of bark separating from the trunk
- New shoots growing from the trunk or lower branches
- A thinning canopy, with branches dying back and fewer leaves than normal
Important: These symptoms can have other causes, too. Seeing one sign does not automatically mean your tree has Emerald Ash Borer.
Concerned about an ash tree on your property? An experienced arborist can evaluate its condition, look for signs of insect activity, and help determine the appropriate next steps.
At Artistic Treeworks, we bring decades of professional tree care experience and ISA Certified Arborist expertise to the Tri-Cities area.
📞 Call (509) 943-4604 to discuss your tree care concerns or schedule an evaluation.
Serving Richland, Kennewick, Pasco, West Richland, and surrounding communities.
Healthy trees start with informed care!
Washington State Department of Agriculture confirmed a second report of emerald ash borers in Washington. An infested ash tree was found in Walla Walla County and reported by an arborist who identified many signs of an infestation, including D-shaped exit holes, canopy dieback, and woodpecker activity.
Check your ash trees for these signs and share this information to help with early detection of this destructive pest.
Learn more at https://invasivespecies.wa.gov/priorityspecies/emerald-ash-borer/
Photos courtesy of Oregon Department of Forestry, Pennsylvania Department of Forestry, Gosztyla, WA DNR UCF, Art Wagner, USDA, Bill Hebner, and Daniel Herms, Bugwood.org