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Report an Invasive Species

  • Yellow Flag-Iris

    Yellow Flag-Iris

    Yellow flag-iris growing in Lost Lagoon in Stanley Park

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  • Japanese knotweed

    Japanese knotweed

    Japanese knotweed

  • Wild chervil

    Wild chervil

    Wild chervil

  • Himalayan balsam

    Himalayan balsam

    Himalayan balsam

About Fraser Valley Invasive Species Society

Himalayan balsam
Protecting Fraser Valley Biodiversity

The Fraser Valley Invasive Species Society is a non-profit society whose mandate is to minimize the negative social, economic, and environmental impacts associated with invasive species. We achieve our mandate through coordination of land managers, education and outreach, and on the ground invasive plant management. Did you know that invasive species are considered to be one of the greatest threats to biodiversity world-wide, second only to habitat loss? British Columbia is Canadas most biologically diverse province and is home to many regionally, nationally, and globally significant plants. British Columbians have a lot to lose from the introduction of invasive plants. Already introduced plant species represent 26% of the entire flora in British Columbia (BC Conservation Data Centre, Ministry of Environment, 2012). All citizens of British Columbia are affected by invasive species. Helps us preserve our natural heritage.

Priority Ranking of Invasive Species

The Fraser Valley Invasive Species Society holds regular strategic planning sessions where we update the list of priority species for management that field season and identify high priority areas for invasive plant management. We currently have four categories for invasive plants:

Species not known to occur in the region but likely to establish if introduced. Watch for, and if found, eradicate.
Species known to occur in limited distribution and low density. Eradicate if found.
Established infestations found in portions of the region. Contain existing infestations and prevent spread to uninfested areas.
Established infestations common and widespread throughout the Fraser Valley. Focus control in high value areas and use biological control if available.

See All INvacive Speacies

How we manage and control invasive plants


Invasive Plant
Management Methods

curly bracket
  1. Cultural Control (prevention)
  2. Mechanical Control (mowing, hand-pulling, cutting)
  3. Biological Control
  4. Chemical Control (herbicides)

Invasive Plant Management Steps

  1. Map the entire management area and its resources
  2. Map and inventory invasive plants within the management area (use the Invasive Alien Plant Program, a public database where all invasive plant inventory and treatment data is housed)
  3. Set invasive plant management goals, objectives, and priorities
  4. Select and implement invasive plant management strategies (manual/mechanical, chemical, biological control – usually some combination of multiple methods)
  5. Develop a monitoring program

News, press releases and articles

New Executive Director Hired!

New Executive Director for the FVISS

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Targeted Grazing with Goats to Manage Invasive Species

Last year the Fraser Valley Invasive Species Society in partnership with the City of Chilliwack and University of the Fraser Valley hosted Conrad Lindblom of Rocky Ridge Vegetation Management to conduct a demonstration on targeted grazing at a stormw

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Guidelines for Protecting Nesting Songbirds while Managing Himalayan Blackberry

I get a lot of questions from birders who want to manage Himalayan blackberry on their property, but who also don't want to destroy nesting habitat for songbirds. I wrote this guideline for protecting nesting birds while managing Himalayan blackberry for t

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