Kennebunkport · York County

Hemlock Woolly Adelgid Treatment in Kennebunkport, ME

Keep the hemlocks on your Kennebunkport property healthy. Hemlock woolly adelgid is established in Kennebunkport, and Tree Medics treats it across York County and Southern Maine.

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Inspecting a hemlock branch for woolly adelgid
CountyYork County
HWA in KennebunkportEstablished
Check twigsTwice a year
One treatment can last4+ years

Hemlock woolly adelgid is a tiny, aphid-like insect from Asia that feeds on the sap of eastern hemlocks. Over several years, a heavy infestation can starve a hemlock of the stored energy it needs to grow, and the tree slowly declines. York County is entirely within Maine’s hemlock woolly adelgid quarantine.[1]

Hemlock woolly adelgid in Kennebunkport

As of December 2024, the Maine Forest Service lists hemlock woolly adelgid as established in Kennebunkport, and says it is widespread along the southern coast.[2]

Treatment options for hemlocks

Long-lastingImidaclopridFor hemlocks under three feet in diameter, one soil application can keep adelgid below damaging levels for more than four years.[3] It moves slowly, taking a year or more to reach the top of a large tree.[4]
Fast-actingDinotefuranMoves through the tree faster, which makes it useful for heavily infested hemlocks, but protects for only one to two years.[4]
Small treesOil and soapHorticultural oil and insecticidal soap can work on small trees, but need thorough coverage once or twice a year.[3]

How we treat hemlocks in Kennebunkport

Step 1InspectWe check the underside of branches for adelgid and judge how much healthy foliage the tree still has.
Step 2Choose the right treatmentHeavily infested trees may need fast-acting treatment first, while healthier trees can get long-lasting protection.
Step 3MonitorWe keep an eye on treated hemlocks so they can be retreated when needed.
Hemlocks respond best when treated early.

Systemic treatments rely on the tree to move them up into its branches. A hemlock with plenty of healthy foliage takes up treatment far better than one that is already in steep decline. Untreated infested hemlocks are likely to die within four to ten years.[4]

Why hemlocks matter

Eastern hemlocks are long-lived, shade-tolerant evergreens that provide year-round screening, shade streams and hold soil on slopes. Losing a mature hemlock changes a property, and replacing one takes decades.

Want the full picture? Read our complete guide to hemlock woolly adelgid treatment in Southern Maine.

Hemlocks and woods in Kennebunkport

Hemlock woolly adelgidBy July 2009 the Maine Forest Service had found hemlock woolly adelgid in Kennebunkport, one of seven southern Maine towns with known infestations at the time.[5]
Local landscapeThe Kennebunkport Conservation Trust’s Edwin L. Smith Preserve covers more than 1,100 acres of forest with 10 miles of trails and is part of an undeveloped block of about 3,000 acres.[6]

Hemlock Woolly Adelgid help near Kennebunkport

Tree Medics is based in Biddeford and works throughout Southern Maine. We also offer hemlock woolly adelgid services in nearby towns:

Kennebunk, MEBiddeford, MESaco, ME

See all tree care in Kennebunkport.

Sources

  1. Maine DACF: Hemlock woolly adelgid quarantine counties and towns
  2. Maine Forest Service: Hemlock woolly adelgid overview and distribution
  3. Maine Forest Service: Hemlock woolly adelgid fact sheet
  4. Michigan Invasive Species Program: Plan to treat trees for hemlock woolly adelgid (2026)
  5. Bangor Daily News: Maine hemlocks to be surveyed for adelgids (2009)
  6. Kennebunkport Conservation Trust: Edwin L. Smith Preserve
FAQ

Hemlock Woolly Adelgid in Kennebunkport: common questions

Is hemlock woolly adelgid in Kennebunkport?

Yes. As of December 2024, the Maine Forest Service lists hemlock woolly adelgid as established in Kennebunkport.

Can a hemlock with adelgid be saved?

Often, yes, especially when treatment starts while the tree still has plenty of healthy foliage. Untreated infested hemlocks are likely to die within four to ten years.

Is Kennebunkport in Maine’s hemlock woolly adelgid quarantine?

Yes. All of York County is within Maine’s hemlock woolly adelgid quarantine, which restricts moving hemlock material.

How long does hemlock treatment last?

For hemlocks under three feet in diameter, one imidacloprid soil application can keep adelgid below damaging levels for more than four years. Dinotefuran works faster but lasts one to two years.

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Worried about a tree?

Many tree health problems can be managed when they are caught early. Reach out today for a professional evaluation.

(207) 303-7291 SaveMyTrees@TreeMedics.com

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