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Note: Classes for 2020 are completed. You can watch recordings of past sessions on our YouTube playlist.

Part One, September 23, 8:00-11:30 am (optional Q&A to 12:00 pm)

  • Weed List Overview and New Noxious Weeds, Sasha Shaw, KCNWCP
  • Early detection species: lesser known noxious weeds that could be your next worst nightmare, Tricia MacLaren, KCNWCP
  • WSDA Pesticide Update, Rusty Sauls, Washington State Department of Agriculture
  • Feature Weeds, Part One: A closer look at yellow flag iris, butterfly bush, and English ivy, Dan Sorensen and Ashlie Arthur, KCNWCP
  • Overview of common herbicides used for noxious weed control, Ben Peterson, KCNWCP
  • Swamp monsters: wetland and aquatic weeds to watch for, Ben Peterson, KCNWCP

Part Two, September 30, 12:30-3:30 pm (optional Q&A to 4:00 pm)

  • Feature Weeds, Part Two: A closer look at holly, yellow archangel, blackberry and Scotch broom, Ashley Shattuck and Sasha Shaw, KCNWCP
  • Biocontrol agents at work on noxious weeds in western Washington, Jennifer Andreas, WSU Extension
  • Amphibian Exposure to Aquatic Herbicides, Amy Yahnke PhD, Washington Department of Ecology
  • Watching out for wildlife: weed control strategies for reducing impacts on birds and amphibians, Margaret Wagner, KCNWCP and Christie Caldwell, City of Bellevue Parks and Community Services

For more information: contact Marta Olson or Sasha Shaw.

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Related information

Related agencies


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).