Emerald Ash Borer (EAB), Agrilus planipennis

Emergency Order Announced for Sections of Oxford County

Maine Quarantine on Emerald Ash Borer

map of emerald ash borer quarantine in MaineCurrent Quarantine Area: The quarantine area includes all of York County, all of Cumberland County, parts of Oxford County, and northern 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

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

Maps, Regulations & Quarantine Information

EAB State Quarantines:
  • EAB Emergency Order DACF/Bureau of Forestry/Forest Health & Monitoring
  • EAB Quarantine Rules (DOC)
  • EAB Quarantine Outside Maine Map as of 4/27/2021 (PDF)
    • Entire states of Alabama, Arkansas, Connecticut, District of Columbia, Delaware, Georgia, Illinois, Indiana, Iowa, Kentucky, Maryland, Massachusetts, Michigan, Missouri, New Hampshire, New Jersey, New York, North Carolina, Ohio, Pennsylvania, Rhode Island, South Carolina, Vermont, Virginia, West Virginia, Wisconsin and any additional areas infested with emerald ash borer as determined by the state agency with regulatory authority, United States Department of Agriculture, Animal & Plant Health Inspection Service or the United States Forest Service, including, but not limited to all areas shown on this map, and
    • All Canadian provinces, counties, regional districts or other civil divisions that are infested with emerald ash borer as determined by provincial authorities or the Canadian Food Inspection Agency (CFIA). Including all areas listed on the most current version of the Emerald Ash Borer Regulated Areas of Canada map published by CFIA.
  • EAB Quarantine Within Maine Map (PDF) - 2/11/2022
    • All of Cumberland and York Counties and Parts of Aroostook and Oxford Counties.
  • EAB Quarantine - Southern Maine Map (PDF) - 2/11/2022
    • All of Cumberland and York Counties and the towns of Brownfield, Denmark, Fryeburg, Hiram and Porter.
  • EAB Quarantine - Northern Maine Map (PDF) - 2/11/2022
    • The northeast portion of Aroostook County including Allagash, Caswell, Connor Twp, Cross Lake Twp (T17 R5 WELS), Cyr Plt, Eagle Lake, Fort Kent, Frenchville, Grand Isle, Hamlin, Madawaska, Madawaska Lake Twp (T16 R4 WELS), New Canada, New Sweden, Saint Agatha, Saint Francis, Saint John Plantation, Sinclair Twp (T17 R4 WELS), Stockholm, T16 R5 WELS, T16 R6 WELS, Van Buren Cove Township (T17 R3 WELS), Van Buren and Wallagrass.
  • EAB Quarantine FAQ (PDF)
  • Guidance for Solid Waste Handlers (PDF) Dealing with potentially infested ash in and outside quarantine areas.
U.S. Maps Known infested areas in the U.S.
Firewood Ban Maine's Emergency Order banning out-of-state firewood
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

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
Biosurveillance Monitoring for EAB with the Cerceris wasp
Tree-Tagging Helping the public appreciate the value of trees
Phenology Model of Emerald Ash Borer Predicting EAB emergence with degree-day data external link
Volunteer Resources Free items to help spread the word

Additional Resources

An Ash Resource Inventory Field Manual State of Maine Indian Reservations
The Story of Emerald Ash Borer a pictorial essay about EAB by the U.S. Department of Agriculture
Emerald Ash Borer Detection in Maine (YouTubeexternal link) Pest and Disease Scouting & Management Activities For Landowners


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