UPDATE - Gypsy Moth Infestation 2021




From all reports we are heading into, what appears to be another rough year with Gypsy Moth. It is expected that we’re going to experience severe defoliation throughout the area. This small caterpillar is attacking oak, beech, basswood, maple among other hardwoods. If you are looking for information read on.


The European gypsy moth is native to Europe and is currently established in northeastern United States and eastern Canada (portions of Ontario, Quebec, New Brunswick, Prince Edward Island and Nova Scotia). The larvae (caterpillars) feed on crown foliage of a wide range of hardwood and some softwood trees, which makes it a defoliating forest pest of concern.


  • Background info from 2020 can be found on MLA Web Site. READ MORE

  • Gypsy Moth and the summer of 2021 –what to expect, and what to do

  • Lanark County has a high level of gypsy moth infestations.

  • European Gypsy Moth - Frequently Asked Questions

  • A webinar is being given by the Forest Health Network to update the public, landowners and cottage associations on what has happened to date with Gypsy Moth in 2021. It is hoped that the webinar will answer the public’s questions on this invasive pest. It is on June 10th at 7 :00 pm. REGISTER HERE




In the news


Conditions ripe for GYPSY MOTH-MAGGEDON

From Frontenac News - 26 May 2021


Over the past week to ten days, pharmacists and doctors’ offices in parts of Eastern Ontario have been inundated with calls about apparent bug bites or poison ivy causing skin irritation, welts, and swelling on arms and necks. Antihistamines, prednisone and painkillers have been prescribed.

Quickly enough, the true cause was determined: tiny caterpillars falling from the sky. The gypsy moth infestation, which resulted in defoliation of the first set of leaves in deciduous trees and major needle loss in evergreens last summer, is back. READ MORE


Gypsy moth infestation another 'cataclysmic insult' to eastern Ontario forests

From Ottawa Citizen - 12 May 2021


“Severe” defoliation is predicted for eastern Ontario’s forests this summer as, for the second year in a row, millions of gypsy moth caterpillars hatch and head to the treetops to feed. READ MORE


Entomologist questions safety, benefits of gypsy moth spraying

From Frontenac News - !3 May 2021


Last June, a gypsy moth infestation devastated oak and pine trees throughout Southern Ontario, leaving a trail of dead leaves and caterpillar dung on the forest floor and backyards everywhere. Later in the summer, the potential for an even greater problem in 2021 appeared on millions of trees, beige thumbprint sized egg sacks. READ MORE