City of Upper Arlington, Ohio

Emerald Ash Borer

Brochure  |  Recommended Replacement Trees
Dying Ash TreeThe Emerald Ash Borer (EAB) is an introduced pest that is killing ash trees across eastern North America. Since its discovery in Detroit, Michigan in 2002, the borer has spread rapidly, killing virtually all ash trees in its path.

With the continued spread of Emerald Ash Borer (EAB) across Ohio, it was a certainty Upper Arlington would some day be added to the list of infested areas. The Ohio Department of Natural Resources (ODNR) confirmed in June 2009 that a dead ash tree removed from a private property showed signs of EAB infestation.

In September 2009, an infested limb in a large ash in Fancyburg Park, near Riverside Drive, was found. It exhibited bark splitting, a larval gallery, and the D shaped exit hole typical of EAB.

Since 2009, EAB has spread across the community, and many ash trees are declining or dying. It is probably safe to assume that every untreated ash in Upper Arlington is now infested to some degree.

Thanks to the foresight and proactive approach taken by our City Tree Commission, City Council and Staff, Upper Arlington has been implementing its EAB management plan since 2006 to prepare for this imported pest.

The Parks & Forestry Division is monitoring specimen trees in our community parks closely, and has plans in place to remove them as infestation occurs. We also have countless ash trees within natural wooded areas. Unless they pose a safety risk, these trees will be left alone to fall, decompose and be replaced by other tree species as part of the natural regeneration process.
On private property, the number of ash trees is unknown but we suspect it is high. Homeowners are responsible for all trees on their property. The decision to treat, remove or retain private trees rests with you, and you may want to consider the many variables involved when evaluating your options. These include: tree size, location and condition; access to the tree; what danger the tree might pose should it fail; shade, heating and cooling values; and treatment techniques, efficacy and cost.

If you have ash trees on your property that you would like to preserve and protect, now is the time to take action. Trees already showing significant symptoms of decline probably can't be saved. Several products exist that will protect your ash trees, as long as you apply the proper dosage at the proper time of year. Treatments must be repeated every year or two (depending on the product and method used) for the life of the tree. The costs of repeated treatments will add up (cost varies with tree size), but it may well be worth the investment compared to the costs involved for removing a large tree from your property should it succumb to EAB. There are many ISA Certified Arborists in central Ohio who can provide treatment. This list focuses on recommended street trees but all would be good choices for front or back yard use, depending on site characteristics.