CountyCumberland County
RegionSouthern Maine
EAB quarantineEntire county
Hemlock woolly adelgidEstablished
Tree Medics protects trees for homeowners, businesses and municipalities in Yarmouth and across Cumberland County. We diagnose tree problems and treat the insects and diseases threatening Southern Maine’s trees, from emerald ash borer to browntail moth.
What’s threatening trees in Yarmouth
Emerald ash borerAll of Cumberland County is inside Maine’s emerald ash borer quarantine.[1] In 2026, ash dieback and mortality were reported throughout southern Maine.[2]
Hemlock woolly adelgidAs of December 2024, the Maine Forest Service lists it as established in Yarmouth.[3]
Browntail mothFound in all 16 Maine counties, and its toxic hairs stay in the environment for up to three years.[4] In 2026, Maine CDC reported higher browntail moth populations in parts of Cumberland County, along with parts of Androscoggin, Hancock and Oxford counties, even as populations statewide have been steadily decreasing over the past couple of years.[5] The Maine Forest Service’s 2026 aerial survey found localized defoliation mainly along the western shores of Sebago Lake.[2]
Beech leaf diseaseNow found in all 16 Maine counties.[6]
About Yarmouth’s trees
Local landscapeYarmouth is a Cumberland County town with a 2020 Census population of 8,990 and a land area of about 13.4 square miles.[7]
Community treesYarmouth is listed by the Maine Forest Service as a Tree City USA community with 44 years of recognition.[8]
Browntail mothYarmouth ran a town browntail moth spraying program in 2019 with an opt-out option, after the Town Council heard browntail moth presentations in February and April 2018.[9]
Community treesYarmouth’s 110-foot elm known as Herbie, which survived 14 bouts of Dutch elm disease under the care of volunteer tree warden Frank Knight for about 50 years, was cut down in January 2010; a preliminary ring count put its age at about 212 years.[10]
Community treesIn May 2023 the Town of Yarmouth received a $10,000 Project Canopy grant for “Trees for All Ages,” a project to plant 37 trees in areas of need with local students.[11]
Tree care services in Yarmouth
Emerald Ash Borer
Trunk injections that protect ash trees from emerald ash borer.
Emerald Ash Borer in Yarmouth
Hemlock Woolly Adelgid
Systemic treatment to keep hemlocks healthy.
Hemlock Woolly Adelgid in Yarmouth
Tree Health Assessments
Find out what’s wrong with a tree and what to do about it.
About tree health assessmentsBrowntail moth season starts in your trees right now.
From October to March, young browntail moth caterpillars overwinter in silk webs at the tips of branches. The Maine Forest Service recommends clipping and destroying webs within reach between mid-December and early April.[12] Browntail moth help in Yarmouth.
A year of tree care in Yarmouth
- WinterClip browntail moth webs, assess trees while branches are bare, and plan spring treatments.
- SpringTrunk injections for ash trees after leaf-out, and browntail moth treatment before caterpillars feed.
- SummerWatch for thinning crowns on ash and early leaf drop. Check beech leaves for dark bands between the veins.
- FallLook for white woolly masses on hemlock twigs, and spot new browntail webs once leaves drop.
Nearby towns we serve
Sources
- Maine Forest Service: EAB found in seven more Maine towns, with York and Cumberland counties under quarantine (2020)
- Maine Forest Service: Forest & shade tree conditions, August 2026
- Maine Forest Service: Hemlock woolly adelgid overview and distribution
- Maine CDC & Maine Forest Service: Browntail moth hairs pose risk during spring outdoor activities
- Maine CDC Health Advisory: Browntail moth (May 2026)
- Maine Forest Service: Forest & shade tree conditions, September 2026
- U.S. Census Bureau: QuickFacts, Yarmouth town, Cumberland County, Maine (2020 Census)
- Maine Forest Service: Project Canopy – Tree City USA
- Town of Yarmouth: Browntail Moth Caterpillar (BTM)
- Bangor Daily News: New England bids farewell to oldest elm (2010)
- Maine DACF: 2023 Project Canopy Grants Announced (2023)
- Maine Forest Service: Browntail moth management overview