Emerald Ash Borer (EAB), Agrilus planipennis

map of emerald ash borer quarantine in MaineMaine Quarantine on Emerald Ash Borer

The Maine Department of Agriculture, Conservation and Forestry has announced a formal quarantine on emerald ash borer (EAB) and material that may harbor it.

Quarantine Area: The quarantine area includes all of York County, all of Cumerland County, parts of Oxford County, and the northeastern corner of Aroostook County. The quarantine boundaries were drawn to include a buffer on those towns where EAB had been detected. EAB was found in northern Aroostook County in May 2018, western York County in September 2018, and Cumberland County in September 2019.

emerald ash borer adult on head of penny

The emerald ash borer (EAB), Agrilus planipennis, is one of the most serious invasive species threatening our ash resources and forests. All species of (Fraxinus) ash trees, but not (Sorbus) mountain ash, that grow in Maine are susceptible to injury and death by the emerald ash borer.

EAB was first found in Aroostook County (Madawaska, Frenchville, and Grand Isle), and York County (Acton, Berwick, and Lebanon), ME in 2018. It was detected in Cumberland County (Portland) in September 2019.

What's New

September 19, 2019 - Proposed Rule to Deregulate the Domestic Emerald Ash Borer Quarantine Questions regarding the elimination of the federal quarantine

EAB Identification

adult emerald ash borer
Ash Trees Can you identify an ash tree?
Report a Suspect Either the beetle or signs of infestation

Maps, Regulations & Quarantine Information

EAB quarantine map
U.S. Quarantine/Maps Current map and regulatory information for the U.S.
Firewood Ban Maine's Emergency Order banning out-of-state firewood
Guidance for Solid Waste Handlers (PDF) Dealing with potentially infested ash in and outside quarantine areas.
Memo to Tree Sellers From Maine's State Horticulturist

Caring for Ash Trees & Managing Forests

EAB management
Guidance for Solid Waste Handlers (PDF) Dealing with potentially infested ash in and outside quarantine areas.

Surveillance, Outreach, Involvement

survey, outreach, involvement
Biosurveillance Monitoring for EAB with the Cerceris wasp
Monitoring for EAB with Traps (PDF) Resource for municipalities and others to purchase monitoring supplies
Purple Trap Survey USDA's detection trap
Trap Tree Network Girdling an ash for EAB detection
Phenology Model of Emerald Ash Borer Predicting EAB emergence with degree-day data external link
Tree-Tagging Helping the public appreciate the value of trees
Volunteer Resources Free items to help spread the word

Additional Resources

The Story of Emerald Ash Borer a pictorial essay about EAB by the U.S. Department of Agriculture


General Basic frequently asked questions about EAB
Quarantine Questions commonly asked about Maine's EAB quarantine (PDF)