CountyYork County
RegionSouthern Maine
EAB quarantineEntire county
Hemlock woolly adelgidEstablished
Biddeford is home base for Tree Medics. Tree Medics protects trees for homeowners, businesses and municipalities in Biddeford and across York 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 Biddeford
Emerald ash borerAll of York 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 Biddeford.[3]
Browntail mothFound in all 16 Maine counties, and its toxic hairs stay in the environment for up to three years.[4] Maine CDC says browntail moth populations have been steadily decreasing over the past couple of years, with higher populations in 2026 in parts of Androscoggin, Cumberland, Hancock and Oxford counties.[5] Even in a quieter year, a single infested oak or apple tree can make a yard miserable in spring.
Beech leaf diseaseNow found in all 16 Maine counties.[6]
About Biddeford’s trees
Local landscapeBiddeford is a York County city with a 2020 Census population of 22,552 and a land area of about 30.1 square miles.[7]
Local landscapeMaine Coast Heritage Trust helped the City of Biddeford expand its wooded Clifford Park by 53 acres in 2011 and holds a conservation easement that permanently limits development of the land.[8]
Local landscapeMaine Audubon’s 27-acre East Point Sanctuary sits at the tip of Fletcher Neck in Biddeford Pool, where the organization is removing non-native invasive plants and replanting with native species.[9]
Community treesIn May 2023 the Maine Forest Service’s Project Canopy program awarded the University of New England $9,800 to create an arboricultural management plan for its Biddeford and Portland campuses.[10]
Tree care services in Biddeford
Emerald Ash Borer
Trunk injections that protect ash trees from emerald ash borer.
Emerald Ash Borer in Biddeford
Hemlock Woolly Adelgid
Systemic treatment to keep hemlocks healthy.
Hemlock Woolly Adelgid in Biddeford
Browntail Moth
Web clipping, injection and treatment for browntail moth.
Browntail Moth in Biddeford
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.[11] Browntail moth help in Biddeford.
A year of tree care in Biddeford
- 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, Biddeford city, Maine (2020 Census)
- Maine Coast Heritage Trust: Exploring Clifford Park
- Maine Audubon: East Point Audubon Sanctuary
- Maine DACF: 2023 Project Canopy Grants Announced (2023)
- Maine Forest Service: Browntail moth management overview