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Weed Control Priorities

NullThe Nez Perce Conservation District adopts the weed control priorities outlined by the Clearwater Basin Weed Cooperative Weed Management Area (CBWMA) as follows:

Management Objective Definitions:

Eradicate: The elimination of every individual of an invasive plant or noxious weed from the CBWMA including all viable seeds and/or vegetative propagules.

Control: Viable seeds and/or vegetative propagules are prevented throughout the target patch and the area of coverage of the weed is decreased over time. Prevent the weed from dominating the vegetation of t+he area but by accept low levels.

Contain: Noxious weeds and invasive plants are geographically contained and are not increasing beyond the perimeter of the infestation.Reduce: The density and/or rate of spread of noxious weeds and invasive plants is reduced across a geographic area.

Custodial: Infestations are treated in association with other weed management priorities. Species may not be inherently invasive or habitats not susceptible to invasion within the Clearwater Basin. The infestation may be beyond current technology or financial capacities, making control, contain, contain or reduce inherently impossible.

Management Priorities:

1st Prevent the establishment of Potential Invaders

  • Purple Loosestrife
  • Leafy Spurge

2nd Eradicate New Invaders

  • Scotch Broom
  • Buffalobur
  • Skeletonweed Bursage
  • Dyers Woad
  • Yellow Toadflax
  • Orange Hawkweed
  • Meadow Hawkweed
  • Purple Loosestrife
  • Puncturevine
  • Tansy Ragwort
  • Rush Skeletonweed

3rd Eradicate New outbreaks (satellites) of established invasive plants or noxious weeds in susceptible habitat

  • Plumeless Thistle
  • Japanese, Giant, Hybrid Knotweed – Geographic focus area is Lapwai Creek
  • Diffuse, Meadow, Russion Knapweed

4th Control noxious weeds or invasive plants along transportation corridors and areas of concentrated activities, such as roads, trails, campgrounds, trailheads parking lots and gravel pits

  • Japanese, Giant, Hybrid Knotweed
  • Dalmation Toadflax

5th Control established noxious weeds and invasive plants in susceptible habitat

  • Hoary Cress
  • Poison Hemlock

6th Contain established noxious weeds and invasive plants

  • Scotch Thistle
  • Common Crupina
  • Jointed Goatgrass

7th Reduce the density or slow the spread of widespread established invaders

  • Field Bindweed
  • Sulfur Cinquefoil
  • Yellow Starthistle
  • Canada Thistle
  • Spotted Knapweed


Nez Perce Soil and Water Conservation District
27880 Chambers Road
Culdesac, ID 83524

Mailing Address:
P.O. Box 131
Culdesac, ID 83524

Contact Us

Phone:  208-843-2931

Fax:  208-843-2234


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