By Veronica Panama | July 31, 2025
Even though emerald ash borer (Agrilus planipennis) was first confirmed in eastern Canada in 2002, its arrival in B.C. marked a critical and alarming move to the west. The shiny, metallic-green beetle was first confirmed in Vancouver, B.C. in May 2024 by the Canadian Food Inspection Agency (CFIA).
This first appearance in the province led to restrictions on the movement of true ash (Fraxinus spp.) material and other firewood around the affected location. Smaller than a penny, this tiny invasive beetle is native to East Asia and is infamous for its ability to harm ash tree populations quickly.
Like many other invasive species, emerald ash borer was likely introduced to Canada unknowingly by hitching a ride in firewood or wooden shipping pallets from overseas. Once here, the beetle can spread through the movement of wood products.
Tracking the Spread
On July 7, 2025, the CFIA announced the expansion of emerald ash borer regulated areas to help slow the spread of this invasive insect to include the cities of Surrey and New Westminster, following the detection of infested trees in the Surrey region. This marks the third expansion of the regulated zones in B.C., which now include:
- City of Vancouver
- City of Burnaby
- University of British Columbia Campus
- University Endowment Lands
- City of Surrey
- City of New Westminster
While emerald ash borer has not been detected in New Westminster, its proximity to known infestations puts the city at greater risk. Immediate responses, such as expanding regulated zones, restricting wood movement, or removing infested trees, can slow or stop the spread.
Why this Tiny Beetle is a Big Deal
Ash trees are key components of B.C.’s urban and riparian habitats. In natural areas, they reduce erosion, stabilize riverbanks, maintain water quality and temperature, and contribute to overall forest health. In cities, they can increase property values, regulate temperature, absorb air pollutants, and provide habitat for wildlife.
The potential loss of ash trees due to emerald ash borer in B.C. could cost billions in tree removals and replacements, while reducing biodiversity and making ecosystems more vulnerable to invasive species.
Help Spot and Report Emerald Ash Borer
Early detection and rapid response are among the most powerful tools for preventing the spread of invasive species like emerald ash borer, and you can help!
Spotting the beetle early greatly improves control efforts. Here are the signs to look for:
- Thinning tree crown or sudden leaf drop
- Bark splits and unusual woodpecker activity, as they love to eat the larvae
- D-shaped exit holes (3 to 4 mm wide) left by emerging adults
- S-shaped larval tunnels (referred to as galleries) under the bark
If you suspect emerald ash borer damage, report your findings using one of the following methods:
- ISCBC Reporting Page
- Mobile apps like iNaturalist or Report Invasives
- Submit a report to CFIA
When reporting, submit clear photos, a precise location (if possible), and a description of your findings.
Within these regulated zones, wood products, particularly ash, including logs, firewood, branches, and woodchips, cannot be moved in or out without CFIA’s authorization.
Transporting firewood from one region to another can contribute to the spread of invasive species. Even if the wood looks healthy, it could hide tiny eggs or larvae beneath the bark.
To help prevent the spread of emerald ash borer, buy local firewood and burn it completely. “A single action can save thousands of trees” says Gail Wallin, ISCBC’s executive director. “Whether it’s by following Buy Local Burn Local or reporting a sighting, people can really help stop the spread.”
Veronica is an Invasive Species Coordinator at ISCBC. She values working in an inclusive and diverse environment that allows her to connect with people across Canada to discuss conservation initiatives, social resilience, and restoration topics. In her spare time, Veronica enjoys spending time in the forest, identifying species she encounters or at the beach with a book in her hand. You can reach Veronica at vpanama@bcinvasives.ca
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