POLK SOIL AND WATER CONSERVATION DISTRICT
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        • Emerald Ash Borer
        • Conifer Focused Forestry
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        • IMap Invasives
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        • The "B" Rated Weeds
        • Aquatic Animal Invaders
        • Reed Canary Grass info
        • Medusahead
        • Biological controls for noxious weeds in Oregon
      • Wildlife >
        • Save Salmon : No Spray Buffers
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A-List Priority Weeds

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TANSY RAGWORT

Tansy ragwort, a biennial weed in the sunflower family, has made a big comeback in parts of western Oregon, especially in the foothills where livestock grazing is prevalent.
Tansy ragwort was unintentionally introduced into Oregon in the early 1920s, and within 30 years, became a regional problem, killing thousands of livestock animals — mostly cattle and horses, and contaminating pastures and hay. By the 1970s, many pastures, hillsides, and log clearings were invaded and heavily infested by tansy ragwort. Tansy is mostly a weed that gets a foothold in plant communities that have been disturbed, either by grazing, logging, construction or fire.
Learn More About Tansy Ragwort
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Integrated Weed Maintenance - Fall 2020

There is a lot of info in this weed maintenance calendar! It is all very useful, including a separate section on blackberry and ivy control along with several ways to look up different control options.
View Integrated Weed Management Document

Additional Information about A-List Priority Weeds

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POLK SOIL & WATER
CONSERVATION  DISTRICT

YOUR LOCAL SOURCE OF CONSERVATION INFORMATION AND ​EDUCATION IN POLK COUNTY, OREGON SINCE 1966

Contact us

580 MAIN STREET,  SUITE A,
DALLAS OR, 97338
​
PHONE: 503-623-9680
OFFICE HOURS: MON.-FRI., 8:00am - 4:30pm
Staff Email & Extensions

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The Polk Soil & Water Conservation District complies with the American with Disabilities Act (ADA) and prohibits discrimination in all its programs, services, activities, and materials on the basis of race, color, national origin, religion, sex, gender identity (including gender expression), sexual orientation, disability, age, marital status, familial/parental status, income derived from a public assistance program, political beliefs, genetic information, veteran’s status, reprisal or retaliation for prior civil rights activity. 
  • Home
  • Our District
    • Staff
    • Board of Directors
    • Minutes and Agendas
    • Committees
    • Operational Documents
    • Employment Opportunities
    • History
  • Technical Assistance
  • PROGRAMS & FUNDING
    • Conservation Reserve Enhancement Program (CREP)
    • OAK WOODLAND & SAVANNAH RESTORATION (RCPP) >
      • RCPP Grant
      • Oak Woodland Management
      • Traditional Ecological Knowledge
      • Native Seeds
      • Native Plants
    • Oregon Watershed Enhancement Board (OWEB) Grant Programs
    • Conservation Easements
    • Successful Projects
    • Disaster Assistance
  • Get Involved
    • District and Community Events
    • Local Work Group Meeting
    • Volunteer - Native Plant Sale
    • Volunteer - Friends of Trees
    • Attend Board Meetings
    • Community Science
    • Join the Board
    • Make a Donation
  • Stay Informed
    • Resources >
      • Agriculture >
        • Oregon’s Agricultural Water Quality Program
        • Small Farms >
          • SOIL CONSERVATION
          • Livestock
          • Organic Operations
      • Forestry >
        • Emerald Ash Borer
        • Conifer Focused Forestry
        • Oak Woodland Management
      • Invasive Species >
        • IMap Invasives
        • A-List Priority Weeds
        • The "B" Rated Weeds
        • Aquatic Animal Invaders
        • Reed Canary Grass info
        • Medusahead
        • Biological controls for noxious weeds in Oregon
      • Wildlife >
        • Save Salmon : No Spray Buffers
      • Water Conservation
      • Native Plants
      • Traditional Ecological Knowledge
      • Rural Living Handbook
      • Resources for Youth
    • Cultivating Publication >
      • Cultivating Archive
    • Conservation Spotlight Podcast
    • Subscribe to Our Newsletter
    • News & Announcements
    • Virtual Events Library
    • Our Partners
  • Native Plant Sale