News and Upcoming Events

2019 Puget Sound Knotweed Forum Spring Meeting

The 2019 meeting will be held in March in Bellingham, WA. For more details, check back here later or contact Erin Haley.

What is the Puget Sound Knotweed Forum?

The Puget Sound Knotweed Forum brings together groups and agencies working to reduce the impacts of invasive knotweed in the Puget Sound region. Annual meetings are held to share ideas and solutions and to coordinate work being done across jurisdictional boundaries. Everyone is welcome and participants come from a wide range of government agencies and non-governmental groups.

For general information about the forum, contact Sayward Glise at the King County Noxious Weed Control Program.

Information on Past Forum Meetings 

2017 Spring Forum

• 2017 Spring Agenda
• 2017 Spring Participants
• 2017 Meeting Notes
• Overview Presentation
  • Justin Brooks, King County Noxious Weed Control Program
• Pollinators and Culturally Significant Plants
  • McKenna Sweet Doorman and Alex Harwell, Snoqualmie Tribe
• Strategies for avoiding pollinator/herbicide interactions
  • Justin Brooks and Sayward Glise, King County Noxious Weed Control Program
• Issaquah Creek, Little Bear Creek and Raging River Knotweed Control and Revegetation
  • Lisa Nelson, Mountains to Sound Greenway Trust

2016 Spring Forum

• 2016 Spring Agenda
• 2016 Spring Participants
• Overview Presentation
  • Justin Bush, King County Noxious Weed Control Program
• Eradication Nation: Lessons learned from the CPU Watershed Restoration Program
  • Bethany Lund, Clark PUD 
• Snoqualmie Tribe riparian weed control projects in the Snohomish Basin
  • Eric Davies, Snoqualmie Tribe ENR
• Application of the successful Cedar River Stewardship in Action program to new watersheds
  • Michelle Quast, Forterra

2015 Forum

• 2015 Agenda
• 2015 Participants
• 2015 Meeting Minutes

2014 Forum

• 2014 Agenda
• 2014 Participants
• 2014 Meeting Minutes

2013 Forum

• 2013 Agenda
• 2013 Participants
• 2013 Meeting Minutes

2012 Forum

• 2012 Agenda
• 2012 Participants
• 2012 Meeting Minutes
• WRIA Maps

2012 Presentations

• Decontamination for Crews and Gear 
  • Kym Foley, EarthCorps
• Water Quality Permits for Aquatic Weed Control in Washington State
  • Greg Haubrich, Washington State Department of Agriculture
• Washington State Program for the Control of Invasive Knotweeds
  • Tanner Ketel, WSDA Invasive Knotweed Program
• Knotweed Treatment in the Cedar River Municipal Watershed
  • Sally Nickelson, Seattle Public Utilities
• Stillaguamish Big Trees Project
  • Rodney Pond and Scott Moore, Snohomish County Surface Water Management
• Amphibian Exposure to Aquatic Herbicides
  • Amy Yahnke, Alexandra Troiano, Christian Grue, University of Washington and Julie Tyson, Marc Hayes, WDFW

2011 Forum

• 2011 Agenda
• 2011 Participants

2011 Presentations

• Techniques, Triage and Lessons Learned for Landscape Scale Knotweed Control
  • Judy Blanco, Cascade Land Conservancy
• Data Management:  Tracking Work in the First Year and Beyond
  • Frances Lucero, King County Noxious Weed Control Program
• Knotweed Invasion in PNW Riparian Forests: Ecological Effects and Restoration Outcomes
  • Lauren Urgenson, PhD, University of Washington School of Forest Resources

Knotweed resources

• Identification and control information
• Instructional videos on knotweed control
• Invasive Knotweed Brochure (pdf, 2 Mb)
• Knotweed Best Management Practices (pdf, 649 Kb)
• Workshops
• How to borrow a stem injector (pdf, 13 Kb)

Projects

• Cedar River
• Green River-Soos Creek
• Skykomish/Tye River
• Upper Snoqualmie River
  • Middle Fork Snoqualmie River
  • South Fork Snoqualmie River

Watershed information

• King County Watersheds Map
• WRIA 7 - Snoqualmie/Skykomish
• WRIA 8 - Cedar/Lake Washington
• WRIA 9 - Green River/Soos Creek

Related information

• Agriculture in King County, Washington
• Northwest yard and garden
• Animals, plants and habitat

Related agencies

• King County Flood Control District
• Dept. of Natural Resources and Parks
• Water and Land Resources Division
• Department of Local Services, Permitting Division

Program offices are located at 201 S. Jackson St., Suite 600, Seattle, WA 98104. To contact staff, see the Noxious Weed Control Program Directory, send an email, or call 206-477-WEED (206-477-9333).