What is the emerald ash borer?

The emerald ash borer (Agrilus planipennis) is a destructive, non‐native, wood‐boring pest of ash trees (Fraxinus spp.). Native to Asia, the emerald ash borer beetle (EAB) was unknown in North America until its discovery in southeast Michigan in 2002. All native ash species are susceptible to attack. Ash trees with low population densities of EAB often have few or no external symptoms of infestation. EAB is a significant threat to urban, suburban and rural forests as it kills both stressed and healthy ash trees. EAB is very aggressive and ash trees may die within two or three years after they become infested. 

Learn More

Through the "Emerald Ash Borer" links on this site you can visit the EAB Information Center for downloadable materials, documents, videos and links to additional resources. Also, review the answers to Frequently Asked Questions, learn how to identify ash trees that may be infested and learn about programs to help replace ash trees with more suitable tree species.