CountyCumberland County
RegionSouthern Maine
EAB quarantineEntire county
Hemlock woolly adelgidIn nearby towns
Tree Medics protects trees for homeowners, businesses and municipalities in Gorham 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 Gorham
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, it was not listed as established in Gorham, but it is established in neighboring towns.[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 Gorham’s trees
Emerald ash borerThe Maine Forest Service reported Gorham’s first confirmed emerald ash borer detection in fall 2020, found in a single girdled trap tree sampled on a landowner’s property.[7]
Emerald ash borerOn August 24, 2021, the Town of Gorham found an emerald ash borer in a monitoring trap hung in ash trees near the parking lot at Fort Hill Park off Route 114, and planned to work with the Maine Forest Service on treatment or removal.[8]
Local landscapeWest Sky Preserve, a 19-acre Gorham property added to the Presumpscot Regional Land Trust in 2017, has a trail that passes through hemlock forest, wetlands and running streams.[9]
Local landscapeDeer Woods Preserve, a fully forested 30-acre gift of land off Day Road conserved in October 2023, is part of the largest remaining undeveloped forest block east of downtown Gorham.[10]
Local landscapeThe Conserve Gorham Community Forest project aims to permanently protect 53 acres of mixed hardwood forest and forested wetland in downtown Gorham along Indian Camp Brook, with a planned trailhead behind Village School.[11]
Community treesA Maine Forest Service list of municipal forestry regulations notes that Gorham’s shoreland timber harvesting standards are more restrictive than state requirements.[12]
Local landscapeGorham had a population of 18,336 in the 2020 Census and covers about 50.59 square miles of land.[13]
Tree care services in Gorham
Emerald Ash Borer
Trunk injections that protect ash trees from emerald ash borer.
Emerald Ash Borer in Gorham
Hemlock Woolly Adelgid
Systemic treatment to keep hemlocks healthy.
Hemlock Woolly Adelgid in Gorham
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.[14] Browntail moth help in Gorham.
A year of tree care in Gorham
- 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
- Maine DACF: Seven Additional Maine Towns Found to Have Emerald Ash Borer (2020)
- WGME: Invasive pest found in Gorham (2021)
- Presumpscot Regional Land Trust: West Sky Preserve (2024)
- Presumpscot Regional Land Trust: Deer Woods Preserve (2023)
- Presumpscot Regional Land Trust: Conserve Gorham Community Forest (2025)
- Maine Forest Service: Examples of Municipal Forestry Regulations (2021)
- U.S. Census Bureau: QuickFacts, Gorham town, Maine (2020)
- Maine Forest Service: Browntail moth management overview