Brown Tail Caterpillars

The newest plague on Maine yards, brown tail caterpillars, and their toxic hairs can make going outdoors miserable.

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Maine Browntail Caterpillar Treatments

What’s the problem?

  1. Health Concerns: The caterpillar’s hairs can cause skin rashes, itching, and allergic reactions in humans. These hairs contain a toxin called thaumetopoein, which can be released when the caterpillars are disturbed or come into contact with human skin.
  2. Defoliation: Large populations of brown tail caterpillars can cause significant defoliation of host plants, potentially weakening or even killing the trees or shrubs.

Life Cycle

  1. Eggs: Brown tail moths lay their eggs in July and August. The eggs are laid in masses on the undersides of leaves and covered with a protective coating.
  2. Caterpillars: The caterpillars hatch in late summer or early autumn and overwinter as larvae. They resume feeding in the spring, usually in April or May, and go through several molts.
  3. Pupation: By late June or early July, the caterpillars pupate in cocoons. The cocoons are typically spun on the branches of host plants or in other protected areas.
  4. Moths: The adult brown tail moths emerge from the cocoons in mid-summer, usually in July or August. The male moths are brown with feathery antennae, while the females are larger and white with a brownish abdomen.

What can we do for you?

Direct Applications

We offer yard treatment for those caterpillars that are showing up on your deck, siding, or smaller trees.  This treatment can severely diminish the population very quickly.

Tree Injections

For larger trees and long term control we offer tree injection services.  These services not only offer a quick punch to current caterpillars but create a residual effect in the tree to stop future generations.  Annual re-inoculation is needed for optimal results.

Servicing Most of Maine!

Our service area includes, but is not limited to, the following cities and towns in Maine. If you’re unsure whether you are located in our service area feel free to contact us.

  • Auburn

  • Augusta

  • Bangor

  • Bar Harbor

  • Bath

  • Belfast

  • Boothbay Harbor

  • Brunswick

  • Camden

  • Carrabassett Valley

  • Dover-Foxcroft

  • Falmouth

  • Gardiner

  • Greenville

  • Kennebunk

  • Lewiston

  • Naples

  • Portland

  • Rangeley

  • Rockland

  • Rumford

  • Skowhegan

  • Waterville

  • Westbrook

  • Windham

  • Yarmouth

  • York

Map of the State of Maine

Service Area

Map of the State of Maine

Servicing Most of Maine!

Our service area includes, but is not limited to, the following cities and towns in Maine. If you’re unsure whether you are located in our service area feel free to contact us.

  • Auburn

  • Augusta

  • Bangor

  • Bar Harbor

  • Bath

  • Belfast

  • Boothbay Harbor

  • Brunswick

  • Camden

  • Carrabassett Valley

  • Dover-Foxcroft

  • Falmouth

  • Gardiner

  • Greenville

  • Kennebunk

  • Lewiston

  • Naples

  • Portland

  • Rangeley

  • Rockland

  • Rumford

  • Skowhegan

  • Waterville

  • Westbrook

  • Windham

  • Yarmouth

  • York

Alison Jacobs
Alison Jacobs
13:50 10 Jul 25
Nicholas is so friendly and great to work with. He keeps us apprised of what is going on. Great company to work with.
April Jones
April Jones
19:18 09 Jul 25
Tyler, was very thorough and informative today. Great customer service.
Mickey Judge
Mickey Judge
15:31 09 Jul 25
Friendly, quick and accurate. Arrived on time. Great job!
Kathleen Martin
Kathleen Martin
13:05 09 Jul 25
Tyler was here right on time. I thought I had a yellow jacket next under my stairs but turned out it was paper wasps. He explained the process of how he was going to get rid of them and how he was going to treat the area. Tyler was very professional and answered all my questions. I would recommend Green Pest Control. Thank you Tyler
MaryAnn Scott
MaryAnn Scott
12:51 09 Jul 25
Trevor was exceptional. He called me when he was on his way, communicated with me when he was at my home and also after he completed the job. Trevor was friendly and knowledgeable and was an excellent communicator.
Brittany Bennett
Brittany Bennett
22:37 08 Jul 25
Phyllis Bebb
Phyllis Bebb
22:00 08 Jul 25
We found the technician Kayla, was very informative, eased our concerns and enjoyed her personality.
Ted Ballard
Ted Ballard
19:10 08 Jul 25
A pleasure to meet John for the initial visit, evaluation and actions.
Seth Waterman
Seth Waterman
18:30 08 Jul 25
We had a great experience with Green Pest Defense. They were able to do same day service to remove a bees nest. They had a reasonable price (their competition wanted a much more and couldn't come out for a few days). And they had very good communication throughout the entire process. I'd recommend them for sure!
Gina Sawin
Gina Sawin
17:48 08 Jul 25
Nate Bergeron is our regular technician so we already knew he was very good, but today he came to deal with an overwhelming wasp infestation in our huge barn. (We are an event venue, so treatment was crucial.) He assessed the somewhat complex evidence, and came up with a well considered plan of action. We are very impressed with his service.
Kelly Page
Kelly Page
10:17 08 Jul 25
great job as always... Thanks
Dylan Hall
Dylan Hall
16:55 07 Jul 25
Trey Havird
Trey Havird
14:28 07 Jul 25
Nate Bergeron
Julie Mondro
Julie Mondro
14:08 07 Jul 25
I’ve been using Green Pest Defense for 4 years now and can’t recommend them highly enough. I first called them the day I moved into my house and discovered a mouse problem—they took care of it immediately, and I’ve had zero issues since thanks to their quarterly maintenance. Anytime I’ve noticed something (ants, hornets nests, etc.), they’ve responded quickly, professionally, and always solved the problem.I pay monthly, and honestly, it’s the one recurring charge I’m actually happy to see. The peace of mind their service provides is priceless. I’d never give up their service.
Matt Stoneback
Matt Stoneback
11:26 04 Jul 25
Rowan was fantastic. She completed all of our services in 1 visit. She went above and beyond to solve all of our issues in 1 visit!
Kathleen DiBurro
Kathleen DiBurro
00:10 04 Jul 25
Stephanie was so helpful and very kind. The whole company was a pleasure to work with. Very supportive.
Millard Carr
Millard Carr
17:03 03 Jul 25
Kimberly Weaver was professional and personable, providing a good summary after visit. Excellent service.
Jacob Garrison
Jacob Garrison
20:38 01 Jul 25
Nate Bergeron came and did a great job getting us established into the service plan! Looking forward to continued service!
Bert Branch
Bert Branch
18:44 01 Jul 25
Michelle Andreasen
Michelle Andreasen
17:39 01 Jul 25
This group is amazing. They’re so fast to communicate, did an amazing job of reviewing our situation and my son was thrilled with the sticker he was given. Would highly recommend!
Billy Hubbard
Billy Hubbard
15:50 01 Jul 25
Trevor came by promptly and was very professional. We have really enjoyed working with Trevor and look forward to continuing to rely on him for our home!
Colleen Ginn
Colleen Ginn
13:54 01 Jul 25
Trevor was timely, pleasant and efficient. Felt very comfortable with service and program
Dylan Wetmore
Dylan Wetmore
13:37 01 Jul 25
We started treatment on our yard this summer and John our technician has been great! He is quick, efficient, and keeps us informed on any issues or scheduled updates. We would recommend him and Green Pest Defense to anybody seeking their services.
Bett Smith
Bett Smith
10:49 01 Jul 25
Great service, the call was handled well and the tech was on time, communicated very well so we know what to expect. Glad we went with Green Pest Defense
Susan Miller
Susan Miller
10:45 01 Jul 25
Bill Horner
Bill Horner
10:18 01 Jul 25
Trevor was great! Knowledgable, affable, thorough!
Jeanne Kelly
Jeanne Kelly
17:48 30 Jun 25
Tyler D. took care of my property today. He was punctual, friendly, competent and a good communicator. Tyler answered my questions and addressed the problems.
Amanda Meader
Amanda Meader
16:10 30 Jun 25
Always happy with your technicians and their work. Thanks!
Lisa Crosby
Lisa Crosby
00:06 29 Jun 25
Jon R. and Matt have been very knowledgeable and helpful. Very happy with the great service they both provide!
Herb Herscowitz
Herb Herscowitz
19:36 27 Jun 25
We have been using Green Pest Defense for about 1 year now. When we arrived at our cabin to open it for the season, we were surprised not to find all kinds of creepy crawly things that had accumulated over the winter. It was relatively pest free except for the presence of house flies that revealed themselves four days after we arrived. We called the office and were told that our service did not cover house flies. The receptionist told us that we would be due for our Quarterly service in a few weeks but said that she would send out the Tech to see what he could find and do the service. Nick arrived and listened to us explain the problem. He talked about possible reasons for the flies to suddenly appear and told use what we could do and what he was going to do. He explained everything that he was going to do with knowledge and clarity. He spent time with us to make sure we knew what he was doing. He sprayed both inside and outside with a variety of substance. He was extremely professional. We are very pleased with the service and recommend them highly.
Richard Frost
Richard Frost
01:33 27 Jun 25
Kim was professional and conscientious about completing the job. Thanks Kim. Really appreciate your help.Many dead carpenter ants the next day. 🐜🐜🐜Thank you
Ceire Parker
Ceire Parker
16:57 26 Jun 25
We love Green Pest Defense! They are always prompt and super helpful and friendly- Kayla takes great care of us and it is so appreciated. Thank you!
Drew Floyd
Drew Floyd
08:49 26 Jun 25
Matt visited our home yesterday for some carpenter ants. Learned that the dust we saw was frass from the ants burrowing through spray foam insulation. He got to work quickly and was so knowledgeable which made us feel better. Highly recommend Green PestDefense especially Matt!
Cherie Black
Cherie Black
20:32 25 Jun 25
These people are great at taking care of the critters that would invade your home. I highly recommend Alex, because of his speed and thoroughness.
Jared Goranites
Jared Goranites
18:29 25 Jun 25
I was a new homeowner and knew nothing, except that bugs were in my house. They reviewed my whole house, talked me through some ideas, came up with a plan, and got straight to it.Their strategies and chemicals work wonders, and they keep sending my favorite guy Alex, who already knows what’s going on in my house/yard. He even climbed under my porch to finally solve a persistent wasp curse.
J Holley
J Holley
16:57 25 Jun 25
We recently changed over from another provider and are so happy that we did. Nate listened to all of our concerns and addressed each and every one. His knowledge, professionalism, and courteous demeanor put us at ease right from the start. We are looking forward to working with Nate and Green Pest for a long time to come.
Michelle Hamann
Michelle Hamann
16:47 25 Jun 25
Lisa Lee
Lisa Lee
15:49 25 Jun 25
Saw some ants, called Green Pest and Nate was here the very next day! Super responsive, friendly and informative!
Taylor Haines
Taylor Haines
13:23 25 Jun 25
Trevor from the Bangor region arrived on time with great communication throughout. The process was well explained, quick, and reasonably priced.
Katherine Morgan
Katherine Morgan
00:47 25 Jun 25
Tyler was very professional and explained what he was using to help rid my home of unwanted pest. He was very friendly and I am happy with the results
Bethany Bottaro
Bethany Bottaro
16:51 24 Jun 25
Great company. I called at 8am about wasps in my backyard. Alex came out by noon to get rid of them same morning! He was so patient in finding the nest and found it quickly. He did a great job and was so kind.
Heidi Cook Harper
Heidi Cook Harper
16:16 24 Jun 25
Just bought a home and discovered large amount of debris accumulating above a door and on the floor. Telephoned Green Pest Defense, and they arrived within one hour. The woman I spoke with on the phone was so friendly, validated my concern, and reassured me that the issue could be treated with success. Costs were immediately disclosed and very reasonable. Trevor was FABULOUS. He immediately recognized the problem, explained the science behind the carpenter ant infestation, and treated the house and exterior. He put preventative treatment in place for wasps and rodents at no extra charge. I never write reviews, but the service and kindness was exemplary with this company. ⭐️⭐️⭐️⭐️⭐️
Linda Turner
Linda Turner
13:43 24 Jun 25
Prompt, courteous, and very effective. Tks
Michael White
Michael White
13:07 24 Jun 25
Thanks for the quick response to our insect issue. Fast and professional 👍
Ron Desjardins
Ron Desjardins
13:03 24 Jun 25
Outstanding service. Matt is very personable and knowledgeable. It is a pleasure to interact with him.
Kevin Chapin
Kevin Chapin
12:51 24 Jun 25
He was pleasant and professional. Thanks for his serves
Carol Phipps
Carol Phipps
23:32 23 Jun 25
GPD has employees who are very easy to work with. They seem to take pride in the work they do.Matt is knowledgeable, and very pleasant. He was at my home for a quarterly check up. Thank you for a great job.
Lisa Neuman
Lisa Neuman
20:10 23 Jun 25
Trevor was great! He asked me about any concerns, explained the maintenance plan for the day, and made sure my cats were safe. A+
Erica
Erica
12:48 21 Jun 25
Alex came to my condo to eradicate wasps that I’m very allergic to. He was here the same day and took care of them very quickly! Thanks Alex!
Rich Whiteley
Rich Whiteley
20:25 20 Jun 25
Matt did a great job helping us figure out our pest control needs.