A weed is a plant that is growing where it is not wanted; it can have strong and healthy growth, and is able to overgrow valued plants by overcrowding, thus depleting soil nutrients and moisture that would otherwise be available to preferred plants.

- General Information/Resources -

  • Publications (Link)
    View 100+ publications about agriculture...
  • NEW - Weed Publications (Link):
    Field Guide to Weeds of the Willamette Valley
    Field Guide to Weeds of Eastern Oregon
    Field Guide to Weeds of the Oregon Coast
  • Laboratories Serving Oregon:  Soil, Water, Plant Tissue, and Feed Analysis (pdf)
    Revised May 2008. Before choosing a lab, call for current prices and procedures for mailing the sample.
  • Calibrating Backpack Sprayers  (Video) (http://media.oregonstate.edu)
    Backpack sprayers are relatively easy to use--and to misuse. This video shows basic sprayer components and how to use them appropriately. It also outlines how to calibrate the sprayer, calculate application rates, and mix pesticides.
  • Crook County Weed Department (Link)
  • Crooked River Weed Management Area (Link)
    The Crooked River Watershed encompasses 2.9 million acres of private, state, and federal lands in Central Oregon.  Noxious weeds do not respect property boundaries.  The CRWMA works cooperatively with all landowners and managers to treat weeds strategically on a population basis.
  • Integrated Weed Control Project (Link)
    Washington State University
  • Invasive & Noxius Weeds (Link)
    Bureau of Land Management
  • Noxious Weeds Brochure (pdf)
    (Note - When viewed online the top half of the first page will appear upside down.  The brochure is 2 pages and is designed to be printed on both sides of 11" x 17" paper, folded in half and then folded in thirds.)
    The problem of noxious, non-native weeds proliferating in Central Oregon is severe. Noxious weeds overrun native vegetation, destroy natural animal habitat, shelter undesirable insects, steal scarce water, infest crops and cost local communities in terms of visual blight, a reduction of property values and lost agricultural dollars.  Some noxious weeds are poisonous to humans, livestock and wildlife.  Seeds from noxious weeds are spread by foot and vehicular traffic along our roadways and through our public lands.  Many property owners unknowingly have these non-native, noxious weeds growing in their yards and fields, which aggravates the situation.
  • Noxious Weed List (pdf)
    Crook County Oregon
  • PNW Plant Disease Management Handbook (Link)
    This handbook is intended as a ready reference guide to the control and management tactics for the more important plant diseases in the Pacific Northwest.
  • PNW Weed Management Handbook (Link)
    This handbook is designed as a quick and ready reference for weed control practices and herbicides used in various cropping systems or sites in Idaho, Oregon, and Washington.
  • TechLine Invasive Plant News (Link)
    Innovative research, success stories, and tips for invasive plant managers.
  • The Crook County Homeowners Weed Control Handbook (pdf)
  • Websites of Interest (pdf)
  • Weed Identification/Monthly Weed Post (Link)
    Montana State University Extension Service monthly weed post, a 2-page bulletin featuring noxious weeds, interesting research, or timely issues related to weed management.