If you have an ash tree on your property in Rock Hill, Tega Cay, or anywhere in York County, there is a good chance it is already under attack. A tiny invasive beetle called the emerald ash borer (EAB) has spread through our area, and it kills almost every untreated ash tree it reaches. The hard part for homeowners: by the time the damage is obvious, it is often too late to save the tree — and a dead ash quickly becomes a safety hazard. Here is what is happening in our area, how to spot the warning signs, and how to decide whether your tree can be saved or needs to come down.
The Emerald Ash Borer Is Here in York County
The emerald ash borer is a metallic-green beetle, about half an inch long, that bores under the bark of ash trees. Its larvae feed on the layer that moves water and nutrients up the trunk — essentially starving the tree from the inside out. It has already killed tens of millions of ash trees across the United States since arriving in Michigan in 2002. It is no longer a far-off problem. The beetle is now confirmed and active in York County, SC, along with several other Upstate counties. Once an ash tree is infested, it typically declines and dies within three to five years, and in some cases much faster.
Warning Signs Your Ash Tree Is in Trouble
Walk out and take a close look at your ash tree. These are the classic symptoms of an emerald ash borer infestation:
- •Thinning at the top. The canopy dies back from the top down, so you will see bare branches and sparse leaves up high while the lower part still looks greener.
- •D-shaped holes. Adult beetles leave tiny, distinctive D-shaped exit holes in the bark, about 1/8 inch wide.
- •Increased woodpecker activity. Woodpeckers go after the larvae, stripping patches of bark and leaving the trunk looking flecked.
- •Sprouts on the trunk. New shoots popping out of the main trunk or base (epicormic sprouts) are a sign the tree is stressed and trying to survive.
- •S-shaped tunnels under the bark. If bark is peeling, you may see winding, S-shaped galleries carved into the wood underneath.
If you are seeing several of these together, the tree is very likely infested.
When Can an Ash Tree Be Saved — and When Should It Come Down?
This is the question we get most, and the answer comes down to how much of the canopy is already gone.
- •Less than 40–50% canopy loss: A healthy, high-value ash tree can sometimes be protected with a professional insecticide treatment, especially if you catch it early. Treatment works best before heavy infestation, and improvement can take a year or two to show.
- •More than 50% canopy loss: At this point, treatment is generally not effective, and the recommendation is to remove the tree as soon as practical. A dead or dying ash does not just lose its leaves — the wood becomes brittle and unpredictable, so branches and even whole trunks can drop without warning. That is a serious risk to your home, your cars, your family, and anyone nearby.
In short: a dead ash tree is not a deal-with-it-later problem. The longer it stands, the more dangerous and the more expensive it becomes to take down safely.
Why Professional Removal Matters With Ash
Dead ash wood is notoriously hazardous to cut. Because the wood gets brittle, it does not behave the way crews expect during a removal — limbs can snap and fall in the wrong direction. This is not a DIY weekend project or a job for an uninsured handyman. It takes the right equipment, experience, and proper insurance to bring one down without damaging your property or injuring anyone. There is also the matter of the wood itself. Local agencies recommend keeping ash and hardwood firewood local rather than hauling it across regions, to avoid spreading the beetle further. A professional crew knows how to handle and dispose of the material responsibly.
Learn more about the emerald ash borer in North Carolina from the NC Forest Service.
Frequently Asked Questions
Q&A
- •Q: How do I know if my tree is an ash? A: Ash trees have opposite branching, compound leaves with 5-9 leaflets, and distinctive diamond-patterned bark on mature trees. Not sure? We can identify it during a free inspection.
- •Q: Is treatment guaranteed to save my ash? A: Treatment is most effective when started before significant canopy decline. Once canopy loss exceeds 50%, removal is usually the safer and more practical option.
- •Q: Can I burn ash wood from an infested tree? A: Yes, but do not transport ash firewood outside the quarantine area. Burning it on-site is the safest way to prevent spreading EAB.
Get a Free Ash Tree Inspection in Rock Hill & Tega Cay
Not sure if your tree is an ash, or whether it is too far gone? That is exactly what we do. Rubio Tree Services offers honest, on-site inspections throughout Rock Hill, Tega Cay, Fort Mill, and the surrounding York County area. We will tell you straight whether your tree can be saved or needs to come down — and give you a clear, fair quote either way. Call (980) 225-4708.