Closures & Information:

The Lower Merion Township Building is restricted to public access and will be available for a limited appointment only basis. Please click here for a department directory. The Lower Merion Transfer Station is open through Saturday, June 6, 2020, for tree debris and branches only. No regular dumping is permitted. Fill out your Census today at!

Emerald Ash Borer

Press Enter to show all options, press Tab go to next option

Since 2002, the Emerald Ash Borer has killed millions of American Ash trees in the Upper Midwest and Northeast. It now is present in Eastern Pennsylvania. Adult beetles leave distinctive D-shaped exit holes in the outer bark of branches and the trunk. Adults are roughly 3/8 to 5/8 inch long with metallic green wing covers and a coppery red or purple abdomen. They may be present from late May through early September but are most common in June and July. Once trees are infested with the beetles, symptoms of the disease will appear in 2-3 years and the trees will die within 4-6 years. Please see, for a description and photographs of the American Ash tree.

Various chemical treatments have been developed to combat the Emerald Ash Borer. Lower Merion residents who have Ash trees on their property should contact an International Society of Arboriculture (ISA) Certified Arborist to determine if their trees should be treated and the method of treatment that will be the most effective.

Additional information about Emerald Ash Borer and treatment options can be found at the websites listed below:

EAB General Info

USDA Forest Service

EAB Insecticide Multi-state Bulletin (PDF)

EAB Homeowner Treatment Info