4-County Cooperative Weed Management
Cooperative Weed Management in Oregon and Washington
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The Lobby
Why Invasives Are a Problem
Reduced Biodiversity/Increased Monoculture
Stormwater Infiltration
Forest Failure
Economic Loss
Erosion
Human Health
Why the Landscape Matters
We’re Urban
We’re Rural
We’re Forested
What Management Looks Like
Why Collaboration Is Important
Our Memorandum of Understanding
Our Partners
Our Management Plan
Our 4-County Map
The Latest Dirt
Calendar
Invasive Plant Information
Weed Management Fact Sheets
Best Management Practices
American Pokeweed
Canada Thistle
Cutleaf/Himalayan Blackberry
False Brome
Garlic Mustard
Giant Hogweed
Hawkweeds
Indigobush
English, Irish, and Persian Ivy
Lesser Celandine
Old Man’s Beard
Knotweeds
Meadow Knapweed
Puncturevine
Reed Canarygrass
Rush Skeletonweed
Scotch Broom
Spurge Laurel
Tansy Ragwort
Tree of Heaven
Water Primrose
Yellow Archangel
Weed Identification and Control Websites
CDFA Encycloweedia
USDA/NRCS Introduced, Invasive, and Noxious Plants
King County Noxious Weed Identification and Control
Oregon Invasive Species Council
ODA Noxious Weed Profiles
OPB The Silent Invasion
OSU Herbarium- Oregon State University
Washington State Noxious Weed Control Board
Printable Guides to Weed Identification & Control
Our Committees
Steering
Outreach and Education
Mapping and Data
Priority Weed Coordination
Call For New Weed Observations
Invasive Plant Data Standards
Technical
Seed Bank
Past Events
Pull Together
2012 Pull Together
2013 Pull Together
2014 Pull Together
2015 Pull Together
2016 Pull Together
2018 Pull Together
Garlic Mustard Working Group
2014 Garlic Mustard Working Group
2015 Garlic Mustard Working Group
2017 Garlic Mustard Working Group
Herbicide Forum
2013 Herbicide Roundtable
2014 Herbicide Roundtable [March]
2014 Herbicide Forum [December]
2015 Herbicide Forum
Past Meetings
How to Help
Funders Packet
Water Primrose
This page is under construction. Please check back.
Contact Us: Sarah Hamilton 4-County CWMA Coordinator
info@4CountyCWMA.org
(503)210-6015