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Plumas/Sierra Noxious WMA

Formed in 1999
Chaired by Tim Gibson, Plumas County Agriculture Department
General contact person Tim Gibson, 530-283-6365,
Mapping contact person Tim Gibson and Linda Conrad, Plumas County
Meetings Every two months at the Plumas County Agriculture Department offices

Outreach Summary


  • Yellow Starthistle - Management and Control Methods brochure (pdf)
  • Medusahead - Management and Control Methods brochure (pdf)
  • Scotch Broom - Management and Control Methods brochure (pdf)
  • Perrenial Pepperweed - Management and Control Methods brochure (pdf)


  • Seminars and workshops for local landowners
  • Weed tours are held annually
  • Weed booth at county fair
  • Booth at Birds, Barns and Barbecues event

Media coverage

  • Local press releases

Project Highlights

Noxious weed roadside treatments

Roads throughout the WMA are mapped and treated for yellow starthistle, tall whitetop and Scotch broom.  Some treatment also occurs on private lands.  Treatment is primarily chemical, but some hand-pulling is done by the U.S. Forest Service along roads and in plots on FS land.  CalTrans participates in the project by providing traffic control.

Cooperative cost-share program

The Plumas/Sierra WMA operates a cooperative cost-share program which provides herbicide at no cost to landowners, who use it to treat yellow starthistle and tall whitetop on their own lands.  Herbicide was previously supplied to all interested landowners, and landowners of 5 acres or less may still participate in the cost-share.

Plumas/Sierra mapping program

The WMA continually maps all A-rated weeds throughout the two counties, and maps all C-rated weeds along roadsides.  They use geographic software for mapping, and the data is stored in a format that may be converted to Arcview.

Organizations on WMA’s MOU

Bureau of Land Management – Eagle Lake and Carson City  District Offices
California Department of Fish and Game
California Department of Food and Agriculture
California Department of Transportation (CalTrans), Districts 2  and 3
Collins Pine (timber company)
Natural Resources Conservation Service
Plumas-Sierra Cattlemen
Plumas-Sierra Farm Bureau
Plumas-Sierra Rural Electric Cooperative (power company)
Roseburg Resources (timber company)
Sierra Pacific Industries (timber company)
Soper-Wheeler (timber company)
University of California Cooperative Extension
US Forest Service – Plumas, Lassen, Tahoe, Humboldt-Toiyabe National Forests
USDA Wildlife Services
W.M. Beatty Associates (timber company)

Other Regular Participants

Other local landowners