Invasive Plants
Priority Ranking of Invasive Plants
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:
Prevent / EDRR
Considered high risk to BC and are either not yet present or new to the province; These species do not occur in the Fraser Valley or have less than 10 known sites. The goal for these species is immediate eradication if they are detected. These sites are extremely high priority for treatment. Watch for presence of this species, particularly near boundaries of the region and report.
Eradicate
These species are known in the Fraser Valley but with very limited distribution (ie. ~50 sites). Eradication is the objective and still achievable based on available control methods. Eradicate if found. These species are the highest priority for planned control operations.
Contain / Annual Control
These species are abundant (with no expectation of eradication) in certain areas of the Fraser Valley but have limited distribution in other areas. These species may also be priority for local governments due to potential harm to infrastructure/agriculture. Contain existing infestations and prevent spread to un-infested areas.
Established / Strategic Control
These are established species that are beyond landscape‐level control and/or have relatively low impact. Land managers may choose to treat these species at high priority sites (eg. wildlife habitat, corridors of spread, adjacent to agricultural land, restoration sites, etc.) based on specific land management objectives. Focus control in high value areas, or areas where reinfestation to the site can be prevented.
Widespread / Limited Action
These are widespread species that are beyond landscape‐level control, and most efforts to control these species would be ineffective or may not feasible. Determine whether resources should be spent on these species, and if the results of spent efforts would be worth it; may depend on infestation size, location, and goals of site.
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