Japanese Knotweed 2013On March 10th 2015, Coastal ISC, BC Parks and BC Ministry of Transportation coordinated a very successful workshop on knotweed to discuss current treatment strategies, and identify knowledge gaps and research needs.  

Over 70 individuals attended the workshop from nonprofit organizations, businesses, and provincial and local governments.

We thank everyone who participated in exchanging information during this workshop! 


The goals of the workshop were to:

1) Share information about knotweed treatment methods from different locations.

2) Collaboratively identify effective treatment methods and their limitations.

3) Identify future strategies, knowledge gaps, and research goals to increase treatment effectiveness.

4) Contribute knowledge towards developing a revised best management practices document.


Speaker presentations (in PDF format):

– An overview of Knotweed Ecology/Phenology in BC (1.5 Mg)  – Ernie Sellentin, Coastal ISC

– The Knotweed Complex: BC Status and New Management Options (2 Mg) – Becky Brown, BC Ministry of Forests Lands and Natural Resources Operations

– Knotweed Genetics in the Pacific Northwest – Verification of our Head Scratching in the Field – Jen Grenz, Invasive Species Council of Metro Vancouver (coming soon)

– An Ecosystem Friendly Way of Treating Knotweed (8.5 Mg) – Dave Polster, Polster Environmental

– Invasive Species Management: An Assessment of Operational Data on the Efficacy of Successive Foliar and Direct Injection Herbicide Treatments on Japanese Knotweed (2 Mg) – Jeremy McClure, Invasive Species Council of Metro Vancouver

– The Long and Winding Road: Knotweed Control on the Olympic Peninsula (3.1 Mg) – Cathy Lucero, Clallam County Noxious Weed Control, Washington

– Knotweed Biology and Control (6.4 Mg) – Sasha Shaw, King County Noxious Weed Program, Washington

Read the summary of key workshop findings.


If you would like more information or have any questions, please contact us.

Many thanks to the BC government for supporting this workshop.

BC Parks  Coastal ISCBC MOT