This page aims to provide information on common tree pests and diseases that affect trees in the Calgary area, as well as some common tree problems and care tips.

Jump to: Pests, Diseases, Tree Care and Maintenance, Other Resources

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Pests

• Aphids
• Ash Leaf Roller
• Birch Leafminer
• Boxelder Bugs
• Bronze Birch Borer
• Cotton Ash Psyllid
• Dutch Elm Disease (DED)
• Eriophyid Mites
• European Elm Scale
• Forest Tent Caterpillars
• Oystershell Scale
• Pine Needle Scale
• Poplar Bud Gall Mite
• Satin Moth
• Spruce Spider Mites
• Western Ash Bark Beetle
• White Pine Weevil
• Woolly Elm Aphids
• Yellow-headed Spruce Sawfly

Diseases

• Aspen Trunk Rot
• Black Knot Fungus
• Bronze Leaf Disease
• Cedar Rust Diseases
• Cytospora Canker 
• Dutch Elm Disease (DED)
• Fire Blight
• Hypoxylon Canker
• Powdery Mildew
• Spruce Broom Rust

Tree Care and Maintenance

• Animal Damage
• Frost Crack
• Salt Damage
• When to prune my tree?
• Why Tree Topping is Bad?

Other Resources

City of Calgary Tree Pests and Diseases

Trees are Good

Trees, insects, mites, and diseases of Canada’s forests