Forest health: pests, diseases and severe weather conditions
What you need to know about pests, diseases and severe weather conditions that affect forest health in Ontario.
Spongy moth and other defoliators
Learn about common caterpillars that strip the leaves from trees and shrubs, and what you can do to protect your property.
Think your trees have a forest health problem? Contact a local arborist for confirmation and treatment options.
Pests
Diseases
Severe weather conditions
Updated: September 21, 2023
Published: November 12, 2021