Home » Invaders » Forest Pests
Asian Long-horned Beetle (Anoplophora glabripennis) photo by Pennsylvania Department of Conservation & Natural Resources
Asian Long-horned Beetle
Anoplophora glabripennis

Emerald Ash Borer
Argrilus planipennis

Gypsy Moth
Lymantria dispar

Invasive Earthworms

Mountain Pine Beetle
Dendroctonus ponderosae

Forest Pests

Forest PestsForest pests are non-native insects that negatively impact Ontario’s forests. Forest pests are generally associated with the import and export of wood packaging materials, shipping containers and the movement of firewood.

Forest pests impact our forest ecosystems by degrading the quality of wood, eliminating wildlife habitat and recreation and cultural value. The emerald ash borer, native to Asia, is an example of a forest pest responsible for killing millions of ash trees in southwestern Ontario since 2002.

Trees are unable to defend themselves against introduced forest pests, resulting in widespread tree mortality. Stressed trees show signs of crown thinning, wilted leaves and premature colouring.

You can help to prevent the spread of unwanted forest pests.

  • Learn to identify invasive forest pests that are a threat to Ontario
  • Don’t move firewood. Burn it where you buy it
  • Don’t move infested wood material to new areas
  • If you see suspected signs of infection on your trees or if you plan on moving firewood, contact the Canadian Food Inspection Agency (CFIA) for more information. 1-866-463-6017 or visit www.inspection.gc.ca
  • Report all sightings to the Invading Species Hotline 1-800-563-7711 or report a sighting online