Thomas Munson

Invasive species taking root in Greater Victoria

Knotweed described as “one of the world’s worst invasive species.”

The Capital Regional District is facing an invasion of knotweed, a bamboo-like plant described by the International Union for Conservation of Nature as “one of the world’s worst invasive species.”

The Coastal Invasive Species Committee (CISC) has been working with local municipalities in an attempt to prevent the introduction of knotweed to the CRD. CISC  treated 120 sites of infestation last year, as well as 67 in 2012.

Executive director Rachelle McElroy cited an increased awareness of the plant as the reason for treatment almost doubling.

“Knotweed is quite widespread in the region, but not to the point where we can’t get ahead of it,” McElroy said. “More people are reporting it as they become more aware of what it looks like and the kind of damage it can do, and more people are learning that we offer free treatment.”

Knotweed is capable of growing four centimetres a day, though McElroy referred to the portion of the plan above surface as “the tip of the iceberg.” Knotweed spreads by the roots, and if left untreated, they can spread 20 metres wide and three metres deep underground.

Knotweed has been known to grow through concrete and home foundations. In the U.K., the plant has become a huge issue for property owners, even disqualifying some from taking out mortgages.

Knotweed can be identified by its hollow, bamboo-like stems, large green leaves, small white flowers and red colouring along the stems. Residents are asked not to cut, mow or compost knotweed, as this can lead to further spreading.

CISC treats knotweed by injecting a herbicide directly into the roots, effectively halting growth. McElroy noted the lack of a registered aquatic herbicide in Canada as an obstacle for prevention. This has lead to a higher rate of growth along streams, where knotweed competes with other plants, resulting in soil erosion and lower oxygen levels, harming salmon populations.

More information on knotweed can be found online at knotonmyproperty.com. If knotweed is found on your property, the CISC can be contacted at 250-857-2472 or by email at info@coastalisc.com.

Just Posted

More opioid harm reduction resources needed for B.C. youth

Front-line workers advocate for a youth-targeted supervised consumption site in Greater Victoria

Search for supportive housing in Saanich remains ‘fluid’

BC Housing looks forward to meeting new council

Cyclist defecates, throws own poop at car in Victoria

Prior to fecal incident, witnesses said cyclist was verbally abusive to driver

Peninsula cab companies want level playing field with ride-hailing legislation

Taxi services concerned they’ll be undercut by Uber, Lyft

Reducing harm with ‘I carry naloxone’ buttons

Victoria-based designer makes buttons with social justice messages

Unique technology gives children with special needs more independent play

UVic’s CanAssist refined seven prototypes aided by $1.5M government contribution

Ottawa Redblacks defensive back Jonathan Rose suspended for Grey Cup

Rose was flagged for unnecessary roughness and ejected for contacting an official with 37 seconds left in the first half following a sideline melee after a Tiger-Cats reception.

Mistrial declared in Dennis Oland’s retrial in father’s murder

The verdict from Oland’s 2015 murder trial was set aside on appeal in 2016 and a new trial ordered. Richard Oland, 69, was found dead in his Saint John office on July 7, 2011.

Laine scores 3 as Jets double Canucks 6-3

Injury-riddled Vancouver side drops sixth in a row

Deportation averted for Putin critic who feared return to Russia

Elena Musikhina, a vocal critic of the Kremlin, has been granted a two-year visitor’s permit in Canada

Outreach group ordered to stop feeding homeless on City of Parksville property

City issued Manna Homeless Society cease and desist order after complaints from public

Victim’s girlfriend testifies on first day of 2016 Chemainus murder trial

“I was soaked in blood from the neck down”: witness

B.C. to allow Uber-style ride hailing services to operate in late 2019

Fee will be applied to fund options for disabled people

Auditor general takes aim at Liberals’ fighter-jet plan

Suditor general Michael Ferguson is about to release a new report on Canada’s attempts to buy new fighter jets

Most Read