Joseph Plains Weed Management Area

The Joseph Plains Weed Management Area (JPWMA)encompasses approximately 180,000 acres located south of the Salmon River (common boundary with the Tri-State WMA), east of the Snake River, north of the Forest Service boundary, and west of the Salmon River WMA. The majority of land located within the JPWMA is privately owned. Consequently, the role of private landowners in the cooperative efforts of weed control is very large. In addition to private landowners, JPWMA cooperators include the Bureau of Land Management (BLM) Cottonwood office, Idaho Department of Lands (IDL) Craigmont office, Idaho Department of Fish and Game Lewiston office (IDFG), and Idaho County Weed Control.

The goals and mission of the JPWMA are for cooperators to work together in order to successfully:

  • Establish control priorities
  • Establish specific weed management objectives
  • Create treatment zones within the Management Area
  • Treat individual weed species/infestations
  • Coordinate the use of resources and manpower
  • Develop common inventory techniques and mapping
  • Manage designated noxious weeds with an integrated approach
  • Test the feasibility of new techniques and management strategies

Though several weeds listed as noxious in the state of Idaho are present in the JPWMA, the most problematic include yellow starthistle, spotted and diffuse knapweed, Dalmatian toadflax, Italian and Scotch thistle, and whitetop. These weeds have demonstrated their ability to spread rapidly in pastures, rangeland, and forests where they decrease forage production for domestic livestock and native wildlife and disrupt natural ecosystems.

County Contact Information
Idaho County Extension Office
Address: 320 W. Main, Room 3
Grangeville, ID  83530
Phone: (208) 983-2667
Fax: (208) 983-0251
Web Address:


Contact Joseph Plains Weed Management Area

Connie (Kahne) Jensen-Blyth
Idaho County Weed Superintendent
320 W Main St
Room 3
Grangeville, Idaho  83530
Phone: 208-983-2667
Cell Phone: 208-985-8810
Fax:  208-983-0251


Service Area

Services provided in:
  • Idaho County, Idaho

To request additions or corrections to this entry email the Administrator
1 Introductory article was found for Joseph Plains Weed Management Area

pdf Joseph Plains Weed Management Area: End of Year Report FY 2009