Who We Are

The Park Country Cooperative Weed Management Area (CWMA) is a grassroots driven organization working to foster collaboration and cooperation among private individuals,private groups, and public entities for one sole purpose-to fight invasive weeds in Park County! The group was fomed in 2008 to provide education and awareness programs that foster public understanding of the threats posed by noxious weeds.

The Park County CWMA is working to maintain the productivity, biodiversity, and beauty of Park County by managing noxious weeds, responding to new infestations, watching out for new invaders and protecting the landscape from noxious weed invasions.

Our Purpose

The purpose of the Park County CWMA is to coordinate invasive weed management efforts including:

Providing informationa and education

Providing technical assistance to private landowners and government land management agencies; and

Collaboratively accomplishing invasive weed mangement in Park County.

What is a Weed

A weed is defined as any plant that interferes with the management objectives for a piece of land or body of water at a given point in time. A "noxious weed" is any weed tha has been designated by the State of Montana as noxious due to its potential to directly or indirectly injure agriculture, navigation, fish, wildlife, or public health

Impacts of Weeds

Weeds have the potential to negatively im

pact the ecological integrity and economic prductivity of landscapes. Weed Infestations harm land values and wildlife habitat; increase the potential for surface runoff, soil erosion, and sedimentation in above-ground water sources; reduce plant diversity and forage available to livestock and wildife; and ultimately displace native plants and plant communities.

Leafy Spurge (Euphorbia esula)

Leafy Spurge

Identifying Features:Hairless, pale, blue-green stems reach 32 inches tall. Leaves are linear to slightly oblong and alternated on the stem. When the plant is injured, a milky latex sap is excreted. Flowers are small and green, and surrounded by paired yellow-green heart shaped bracts.

Control Methods

Grazing: Sheep, Goats 

Insects: spurge hawk moth, flea beetles,
gall midge, root boring beetle 

Herbicides: picloram, imazapic, dicamba

Spotted Knapweed (Centaurea stoebe)

Leafy Spurge

Identifying Features:
Several branched upright stems grow from a stout taproot and reach up to 5 feet tall. Leaves become smaller toward the top of the stem. Flowers (pink, purple, or white) grow at the branch ends. Bracts at the flower heads have vertical veins below a black triangular spot on the tip.t

Control Methods

Control Methods
Grazing: Sheep, Goats, Cattle 
Insects: seedhead, root beetle, yellow-winged moth, root weevil
Herbicides: picloram, clopyralid, 2, 4-D, dicamba

Houndstongue (Cynoglossum officinale)

Leafy Spurge

Identifying Features:
Leaves are oblong, rough, and resemble a dog's tongue. Flowers range in color from red to burgundy. Each flower produces 3-4 nutlets (seeds) which are flat and teardrop-shaped with a very hard seed coat and numerous barbs.t

Control Methods

Control Methods
Mechanical:dig, hand-pull

Insects: seedhead, root beetle, yellow-winged moth, root weevil
Herbicides: metsulfuron, chlorsulfuron, 2, 4-D, imazapic