The purpose of the Tri-County Cooperative Weed Management Area is to facilitate cooperation among all land managers and landowners to manage a common problem with noxious weeds. Our mission being to serve as responsible stewards of the land and resources in the state of Oregon by protecting and preserving all lands and resources in the tri-county area from the degrading impact of exotic, invasive noxious weeds.


Click on the county names to see what we are doing in your area

For some noxious weeds, fall and early winter treatment can provide great results. Unlike treatment during the active growth stages (spring), fall treatment takes advantage of their transition into the dormant season or species that produce fall rosettes. Here are some species that we will be targeting this fall in all three counties: 

Download here our list of contractors for 2016

Fall is right around the corner and so is the start of a new treatment season

Yellow Flag Iris
Rush Skeletonweed
Leafy Spurge