Emerald Ash Borer

Emerald Ash Borer

The Emerald Ash Borer (EAB) was first detected in North America in the Detroit, Michigan area in June 2002 and later that year in Ontario, Canada. Since then EAB has been found in Michigan, Ohio, Indiana, Maryland, Virginia and now Illinois (Click here to view a map of infested areas). Locally the EAB has been found on the North Shore in Wilmette and Evanston.

Glenview is inside the quarantine area for movement of brush, branches and tree materials. The natural spread of the EAB is about half of a mile or less annually; however, humans can greatly accelerate its spread. Firewood and log movement have been the primary means by which EAB is spread, so it is important when using firewood to purchase it from local vendors, and not transport it between areas.

EAB is native to Asia and is suspected to have arrived in this country in cargo utilizing wood packing material. In its native range, EAB attacks and kills trees that are weakened by stresses such as drought, disease, and mechanical injury. Unfortunately, in North America, EAB also attacks and kills healthy trees. This invasive pest is so aggressive that virtually all native ash trees are at risk, and trees may die within two to four years after they have been infested.

To date, over 15 million North American ash trees have been killed by the EAB. If the EAB is not contained, the devastation to our ash trees may be similar to that of the American elm trees that were decimated by Dutch Elm Disease. According to the Morton Arboretum Emerald Ash Borer website, the potential impact from the EAB in Illinois is significant. Ash trees account for six percent of forests state-wide and 20 percent of urban forests in communities in the northeastern part of the state or approximately 130 million ash trees.

EAB is a metallic green beetle about half the diameter of a penny and will be found on or around ash trees. Click here for an identification guide.

You know you have an EAB problem if you see:

  • Snake-like or S-shaped paths (under the surface of the tree’s bark) and exit holes shaped like the letter D in the trunk or limbs
  • Increased woodpecker activity
  • Thinning canopy and yellow leaves
  • Short vertical splits in the bark
  • White colored larvae found under the bark
  • Unusual leaves growing from the trunk and roots

For more detailed information on signs and symptoms of EAB infestation, click here.

If you suspect that you have an EAB problem contact the Village of Glenview at 847-657-3030. If you suspect an EAB problem in our parks, contact the Glenview Park District at 847-657-3215.

Emerald Ash Borers and the Glenview Park District

The Glenview Park District is proactively working to combat the Emerald Ash Borer beetle. Each spring, more than 50 ash trees throughout the park district are treated with a pesticide designed to kill the Emerald Ash Borer larvae as they feed under the tree bark. The park district has also co-sponsored public workshops with the Village of Glenview to educate homeowners about EAB control and prevention options.