Browntail Caterpillar/Moth

Invasive & toxic species
bt caterpillar

Why are they a problem?
The browntail caterpillar has tiny (0.15 mm) hairs that on sensitive individuals cause a skin rash similar to poison ivy and/or trouble breathing. The microscopic hairs break off the caterpillars and are everywhere in browntail infested areas; on trees, lawns, gardens, decks, picnic tables and in the air. The hairs can remain toxic for up to THREE YEARS so although the problem is worst from May to July, they may cause a reaction at other times of year as well. Wind or activities such as mowing, leaf-blowing, etc., can stir up the hairs, leading to a reaction. The rash and trouble breathing can last anywhere from a few hours to several weeks. It is caused by both a chemical reaction to a toxin in the hairs and physical irritation from the barbed hairs. Contact your physician if a reaction is severe.

For more information, please click this link
https://www.maine.gov/dacf/mfs/forest_health/documents/browntail_moth_brochure.pdf

If you have a nest/infestation, please go to this website for a list of licensed pesticide companies who deal with the browntail caterpillar/moth.
https://www.maine.gov/dacf/mfs/forest_health/invasive_threats/browntail_moth_pesticide_applicator_info.htm