Tree management

​Emerald ash borer Emerald Ash Borer

The emerald ash borer (EAB) is a metallic green beetle that bores into ash trees eating the tissues beneath the bark, eventually killing the tree. This non-native insect was first found in the United States near Detroit, Michigan in 2002. 

The EAB is now found in many Midwestern and Eastern states and has already killed millions of ash trees. The City of Charlotte’s tree management group is working on an action plan to manage public trees and to provide information for citizens. 

Report possible sighting of EAB to 800-206-9333 or newpest@ncagr.gov

​All species of ash trees are susceptible.  This includes all four species native to North Carolina - white ash, green ash, Carolina ash, and pumpkin ash. 

​The larvae of the beetle bore into the bark and feed on the tissues of the tree. This prevents the movement of nutrients and water within the tree, eventually causing it to die.

​The adult leaves a “D”-shaped exit hole in the bark about 1/8 inch in diameter when it exits the tree. The canopy of the tree begins to thin, and dieback begins at the top of the tree. Most of the canopy will be dead within two to five years of when symptoms are first observed.

​Insecticides are available for those wishing to protect high-value ornamental trees. Re-treatment must take place every one to two years. Contact a certified arborist for more information on treatment options. Also, consult this Emerald Ash Borer insecticide guide​.

​It is estimated that the City manages 1,300 ash trees in the public right of way.​

​Consult this document​ to find out where the EAB has been spotted in North Carolina.

​Refer to this document​ for a handy guide to identifying ash trees that are vulnerable to the Emerald Ash Borer.

​​​