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  • Noxious Weed Identification List

    Teasel


    Dipsacus sp.

    Info Sheet Adobe PDF Icon   

    Colorado List B - Control required in Jefferson County

    General

    • Family: Dipsacaceae
    • Biennial
    • Native of Europe
    • Introduced to North America in the 1700s

     

    Habitat

    • Found in pastures, rangeland, right-of-ways, ditch banks and disturbed areas
    • Moist to dry, fertile soil.

     

    PLANT

    Vegetation

    • Mature plants grow 2 to 8 feet tall
    • Leaves are oblong, hairy
    • Clasps the stem, forming cup-like structures

     

    Roots

    • Thick tap root

     

    Flower

    • Color: purple and white
    • Season: flowers June through October
    • Each plant produces about 3,300 seeds
    • Upward curving stiff bracts below flower heads

     

    Seed

    • 3,300 per plant
    • Seed drops from mother plant
    • May be transported by birds
    • Most germinate in the first season

     

    Seedling

    • Seedlings live for a year or more before bolting

     

    Reproduction

    • Seed

     

    CONTROL

    Biological

    • None

     

    Chemical

    Apply one of the following during the rosette stage (spring or fall):

    • 2,4-D; or
    • Escort; or
    • RoundUp, Rodeo

     

    Cultural

    • Prevention – maintain health of site
    • Cultivation
    • Seed head removal and disposal
    • Rosette removal

     

    Mechanical

    • Burning - Late spring (new populations) 
    • Grazing - N/A 
    • Mowing - Repeated before flower formation 

     

    Use all chemicals according to the manufacturer's label. Listing the above methods or products does not imply a specific recommendation or endorsement.



    Alicia Doran
    Weed & Pest Management Specialist
    303-271-5989
    adoran@jeffco.us

    weed-pest-b-teasel-rosette

    weed-pest-b-teasel-seedhead


    Last Updated: 8-1-2013