Weeds-Meadow Knapweed

MEADOW KNAPWEED Back

Meadow knapweed is a perennial that reproduces by seed and crown. It is highly competitive and will displace native plant communities, reducing forage for wildlife and livestock. Meadow knapweed flowers from July to September. It primarily infests roadsides, waste areas, vacant fields, pastures, and rangeland.

Control

Cultural: Cultivation can be effective. A fallow program prior to pasture reseeding is another method to consider.
Biological: The seed head gall fly, Urophora quadrifasciata, has had fair amounts of success on meadow knapweed. The larvae feed and develop in the maturing seed heads.
Chemical: The following herbicides will control this weed in rangeland, pastures and other non-crop areas: picloram, triclopyr or clopyralid. Picloram is a "Restricted Use" product and can only be applied by a licensed applicator. Always assure that your choice is suited for your particular situation and compliments your long-term objective.

When choosing any kind of control method, assure that your choice is suited for your particular situation. Always read and follow the product label before applying any herbicide.