Nelson to remove invasive knotweed

Treatment will involve spot-application of a non-glyphosate herbicide by a licensed contractor

Submitted by the City of Nelson

The City of Nelson will begin a knotweed eradication program on public lands this month.

The city has partnered with the Central Kootenay Invasive Species Society (CKISS) to identify priority locations and incorporate best management practices utilized in other jurisdictions for knotweed control. Nelson’s Official Community Plan identifies the removal of invasive species as a goal.

Japanese knotweed is listed by the International Union for Conservation of Nature as one of the world’s 100 worst invasive species. The B.C. government and CKISS consider knotweed one of the highest priority plants to be eradicated.

Four species of knotweed are found in B.C.: Japanese, Giant, Himalayan, and Bohemian. These plants are native to eastern Asia and introduced to North America as a decorative garden shrub in the 1800s. Often mistaken for bamboo, this tall and pretty plant is fast-growing (six centimetres per day) and requires minimal care.

However, the extensive root system can damage concrete walls, pavement, bridge, and building foundations, drainage works, and flood prevention structures, resulting in expensive problems for both the city and private landowners. When the plant spreads into riparian areas, it reduces valuable habitat and causes erosion and sedimentation, which impacts both terrestrial and aquatic ecosystems.

Knotweed is notoriously difficult to eradicate, and studies around the world have repeatedly shown that mechanical efforts such as cutting, digging, smothering, or burning are ineffective and can contribute to its spread. As a result, Nelson’s treatment plan will involve spot-application of a selected non-glyphosate herbicide by a licensed contractor, as recommended by current best practices.

Treated sites will have clear signage during the application process and for two weeks following. You are encouraged to avoid contacting the treated plants for at least 12 hours.

The city hopes to lead the way in eradicating knotweed in Nelson and encourages residents who have the plant on their property to follow suit and make every effort to remove or contain it to prevent further damage. To learn more about knotweed and its removal, visit: https://ckiss.ca/species/invasive-knotweeds/

The tentative schedule to apply the applications to the knotweed on city lands is during the first week of October, depending on the weather. There are three sites identified: two near Lakeside Park and one behind the Curling Club. All three affected sites will have signage.

For more details on the City of Nelson’s knotweed efforts or to report knotweed within city limits, please contact Nelson public works at 250-352-8238.

Get local stories you won't find anywhere else right to your inbox.
Sign up here

Just Posted

Plane crashes into Nelson supermarket parking lot

Pilot and passenger have minor injuries

Phase three presents new opportunities for Kootenay tourism

Message from MLA Michelle Mungall and MLA Katrine Conroy

QUIZ: How much do you know about British Columbia?

On this B.C. Day long weekend, put your knowledge of our province to the test

VIDEO: Otter pups learn to swim at B.C. wildlife rescue facility

Watch Critter Care’s Nathan Wagstaffe help seven young otters go for their first dip

Michael Buble among 13 British Columbians to receive Order of B.C.

Ceremony will be delayed to 2021 due to COVID-19

U.S. border communities feel loss of Canadian tourists, shoppers and friends

Restrictions on non-essential travel across the Canada-U.S. border have been in place since March 2`

Rollout of COVID-19 Alert app faces criticism over accessibility

App requires users to have Apple or Android phones made in the last five years, and a relatively new operating system

Alleged impaired driver sparks small wildfire near Lytton after crash: B.C. RCMP

Good Samaritans prevented the blaze from getting out of control

B.C. First Nation adopts ‘digital twinning’ software to better manage territory

Software allows users to visualize what a mountain might look like if the trees on its slopes were logged

All inquiry recommendations implemented after fatal Port Hardy RCMP shooting: Ministry

The Independent Investigations Office of B.C. cleared the RCMP officers involved of wrongdoing

Leave your deets when dining: Restaurants taking personal info to trace COVID-19

Health officials say indoor dining presents a higher risk

Most Read