In Focus: The Gypsy Moth Caterpillar
Total Damage 2021600K Hectars
- 2019
- 2020
- 2021
In 2021 it is estimated that the Gypsy Moth Caterpillar defoliated over 600 000 Hectars of Ontario trees.

Summer 2021
While the gypsy moth caterpillar itself is an interesting looking insect, the damage they caused in Ontario this past summer is unmistakable.
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Not Sure If You Should Spray?
The decision to spray (or not to spray) depends on location, the type of pest, local guidelines, and the history of pests in your area.
Learn MoreWhy Spraying Trees is Necessary
When an infestation occurs (as seen in the 2021 gypsy moth caterpillar outbreak) tree spraying is often the best, most effective way to quickly control the problem.
Throughout most of our lives we enjoy nature, travel to cottages, hike, bike, and walk within the trees and most often don't think about the pests that can harm them. Trees rely on mother nature to provide them with sunlight, water, nutrition, and protection. However, when invasive species (gypsy moth caterpillars, oak borers, emerald ash borer, carpenter ants, beetles, worms, and other insect lavae) then tree spraying is necessary to protect the tree.
How Do I Know I Have a Problem?
The most common evidence of a problem is often seen via the defoliation of trees (leaves being eaten) but the pests may also be visible in nests, or physically crawling on the trees. If an infestation is present the most often will not resolve on their own and will require the use of insecticides and sprays to control the outbreak.



