Modoc County Weed Management Area Formed: 1998
Region: Modoc County, CA
Purpose
The Modoc County Weed Management Area (WMA) utilizes an Integrated Weed Management Plan to identify and prioritize zones of noxious weed concern strategically. To ensure systematic control, the WMA deploys specialized management programs that precisely track and monitor weed distribution. The organization also collaborates with local landowners and land managers through comprehensive surveys to detect new infestations, while leveraging historical geospatial data and weed maps to prevent and monitor re-infestations.
Noxious Weeds of Concern
Scotch thistle (Onopordum spp.), yellow starthistle (Centaurea solstitial), Canada thistle (Cirsium arvense), bull thistle (Cirsium vulgare), Dalmatian toadflax (Linaria dalmatica), Mediterranean sage (Salvia aethiopis), Dyer’s woad (Isatis tinctoria), Russain knapweed (Centaurea solstitialis), squarrose knapweed (Centaurea virgata subsp. squarrosa), musk thistle (Carduus nutans), plumeless thistle (Carduus acanthoides), puncture-vine (Tribulus terrestris), leafy spurge (Euphorbia virgata), and Crupina (Crupina vulgaris)(State and Federal).
Events
- WMA Meetings in Spring and Fall
- Modoc Ag. Expo
- Modoc County District Fair
- Noxious Weeds Workshops and Tours
Media/Publications
- Modoc County Record
- Modoc County Noxious Weed Brochures
- Weeds of the NE Identification Guide
Projects
- Spring 2026
- Lookout Project
- Cedarville Project
- Fall 2026
MWMA MOU Collaborators
Bonneville Power Company
Bureau of Land Management – Applegate Field Office
Bureau of Land Management – Lakeview District Office
Bureau of Land Management – Northern California District Office
Bureau of Reclamation
CA Department of Transportation – District 2
CA Department of Fish and Wildlife
CA Department of Fish and Wildlife – Ash Creek Wildlife Area
CA Department of Food and Agriculture
City of Alturas
County of Modoc
Fall River Resource Conservation District
Goose Lake Resource Conservation District
Honey Lake Valley Resource Conservation District
Klamath County
Klamath County Soil and Water Conservation District
Lake County Soil and Water Conservation District
Lake County Cooperative Weed Management Area
Lookout Pest Abatement Benefit Zone
Modoc County Cattlemen’s/Women’s Association
Modoc County Department of Agriculture
Modoc County Farm Bureau
Modoc Nation
Modoc Resource Conservation District
Modoc County Road Department
Modoc – Washoe Experimental Stewardship Program
National Park Service – Lava Beds National Monument
Natural Resource Conservation Service – Alturas
Oregon State University Service – Lake County
Oregon Department of Agriculture
Pacific Power
Pit Resource Conservation District
Sierra Pacific Industries
Surprise Valley Electrification Corp.
Stronghold Newell Pest Abatement Benefit Zone
Tulelake Irrigation District
Tuscarora Gas
UCCE Lassen County
UCCE Modoc County
UCCE Tulelake/Siskiyou County
US Forest Service – Fremont – Winema National Forest
US Forest Service – Modoc National Forest
US Fish & Wildlife Service – Modoc National Wildlife Refuge
US Fish & Wildlife Service – Tule Lake National Wildlife Refuge
Vya Conservation District
W. M. Beaty & Associates, Inc.
General Contact:
Modoc County Agricultural Department
Phone: 530-233-6401
Email: agcommissioner@countyofmodoc.gov
Mailing & Physical Address: 335 N. Main St, Alturas, CA 96101