|Mechanical and herbicide. Contact your County Weed District or local Applicator for more information.
|Irrigation ditches, river corridors, forests, grasslands, roadsides, rangelands and pastures.
|Extensive root system.
|Deeply lobed lower leaves, linear upper leaves.
|Perennial; two years or longer.
|Priority 2B Weed
|Abundant in Montana and widespread in many counties.
|Similar Looking Plants
|Spotted knapweed, meadow knapweed and diffuse knapweed.
|Root system has a black, bark-like covering. Plant is allelopathic (inhibits growth of other plants) and develops dense stands due to its ability to out-compete resident vegetation.