CountiesSagadahoc, Lincoln, Knox, Waldo
Browntail mothAll 16 counties
Beech leaf diseaseAll 16 counties
Call(207) 303-7291
Tree Medics serves homeowners, businesses and municipalities in Midcoast Maine, from Bath and Brunswick up through Camden and Belfast.
Tree health threats in Midcoast Maine
Hemlock woolly adelgidSagadahoc, Lincoln, Knox and Waldo counties are all entirely within Maine’s hemlock woolly adelgid quarantine.[1]
Emerald ash borerThe City of Bath has been working to protect its ash trees from emerald ash borer.[2]
Emerald ash borerThe Town of Camden has begun treating public ash trees for emerald ash borer.[3]
Beech leaf diseaseBeech leaf disease has been found in all 16 Maine counties, and damage has been most severe along the Midcoast, where it has been present the longest.[4]
Browntail mothThe Maine Forest Service has found browntail moth in all 16 counties.[5]
More on trees in Midcoast Maine
Beech leaf diseaseIn 2026 the Maine Forest Service reported that beech leaf disease damage is most severe along the Midcoast, and that mature beech mortality was recorded in 2025 at monitoring sites in Knox and Waldo counties.[6]
Browntail mothThe Maine Forest Service reported in 2026 that browntail moth defoliation continues to decline in Midcoast areas following the 2021 peak.[7]
Browntail mothIn May 2010 the Maine Forest Service warned residents of Topsham, Bath, West Bath, Brunswick and Bowdoinham about widespread browntail moth caterpillar infestations.[8]
Emerald ash borerEmerald ash borer was reported for the first time in Sagadahoc County in 2024 by the Bath city arborist, about four miles from a known infestation in Brunswick.[9]
Emerald ash borerIn 2026 an adult emerald ash borer trapped in Bristol became the first known detection in Lincoln County.[10]
How Tree Medics helps
Ash treesEmerald Ash Borer TreatmentTrunk injections, retreated every two to three years, to protect valuable ash trees.
HemlocksHemlock Woolly Adelgid TreatmentSystemic treatment that moves into the twigs and needles where adelgid feed.
Oaks & hardwoodsBrowntail Moth TreatmentWeb clipping, injection and targeted treatment for browntail moth.
DiagnosisTree Health AssessmentsHealth and risk assessments, property inspections and written reports.
Not sure if we cover your town?
Tree Medics is based in Biddeford. Call (207) 303-7291 or email SaveMyTrees@TreeMedics.com to talk about trees on your property in Midcoast Maine.
Other Maine regions
Sources
- Maine DACF: Hemlock woolly adelgid quarantine counties and towns
- NEWS CENTER Maine: City of Bath fighting emerald ash borer
- Town of Camden: Ash tree treatment for emerald ash borer has begun
- Maine Forest Service: Forest & shade tree conditions, August 2026
- Maine CDC & Maine Forest Service: Browntail moth hairs pose risk during spring outdoor activities
- Maine Forest Service: Forest & Shade Tree – Insect & Disease Conditions for Maine, August 3, 2026 (2026)
- Maine Forest Service: Forest & Shade Tree – Insect & Disease Conditions for Maine, August 3, 2026 (2026)
- Bangor Daily News: Caterpillar infestations reported in Maine towns (2010)
- Maine Forest Service: Forest & Shade Tree – Insect & Disease Conditions for Maine, October 9, 2024 (2024)
- Maine Forest Service: Forest & Shade Tree – Insect & Disease Conditions for Maine, August 3, 2026 (2026)