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Home > Alberta's Resource Inventory > Forests > Agents of Change > Insects and Disease

Resource Inventory

Insects and Disease

Decaying Trees near Elk Island ParkThe major forest insect pests in Alberta include defoliators (eastern spruce budworm, forest tent caterpillar) and bark beetles (mountain pine beetle and spruce beetle). The major forest diseases are dwarf mistletoe, wood decay, armillaria root rot and stem cankers.

Insect pests and disease represent a significant disturbance of forests ecosystems in Alberta. From 1988–1992, the estimated average annual growth loss due to major forest insect pests and diseases in Alberta was the equivalent of about one half of the timber volume harvested in the province during the same period.

Department of the Environment. State of the Environment Report, Terrestrial Ecosystems. Edmonton: n.p., 2001. With permission from Alberta Environment.

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