06/02/2026
🐛 Seeing caterpillars everywhere already? We’re expecting to see a LOT in Calgary this season… Forest Tent Caterpillars!
These pesky little leaf-munchers can quickly defoliate trees and shrubs, leaving them stressed and looking rough by summer. While healthy trees can often recover, repeated feeding can weaken them and make them more vulnerable to other issues.
🌳 The good news? You’ve got options!
✔️ BTK (Bacillus thuringiensis var. kurstaki) – A highly effective biological control that targets caterpillars when they feed on treated leaves. It won’t harm birds, pets, pollinators, or other non-target insects when used properly.
✔️ Protek Trunk Barrier – An easy-to-use, trunk treatment that helps stop caterpillars in their tracks before they climb and feed.
🌳 Not sure what your trees need? Stop by Spruce It Up Garden Centre and we’ll help you find the best solution for your yard. Let’s protect those trees before the caterpillars take over!