Invasive Forest Pests and Pathogens
Invasive forest pests include insects and diseases that have been introduced accidentally into British Columbia, or have migrated here, and threaten the health of forest ecosystems.
The Government of B.C. manages several invasive forest pests that have been recognized under federal regulations as "officially established" in Canada. Invasive species not officially established in Canada are managed by the Government of Canada.
Gypsy moths are a threat to B.C.'s ecology and economy. The insect attacks both forests and urban trees. The presence of moths in a jurisdiction poses a quarantine challenge and a potential threat to the endangered Garry Oak ecosystem in southwestern B.C.
Balsam Woolly Adelgid
This tiny, wingless, aphid-like insect infests and kills or severely damages true firs in south coastal B.C. So far its range is limited but it is expected to expand to more areas throughout B.C.
- Balsam Woolly Adelgid
- For more information, see Page 40, Field Guide to Forest Damage in British Columbia (PDF)
White Pine Blister Rust
This disease of five-needle pines has been established in Canada for about a century. It has significantly impacted the economic viability and survival of western white pine, whitebark pine and limber pine in B.C.
The fungus Mycosphaerella populorum (Septoria musiva) causes leaf blight and, more importantly, necrotic lesions (cankers) resulting in stem breakage of hybrid poplar. All native BC species of Populus are somewhat susceptible. A chief Foresters memorandum provides direction on poplar use in BC.