Scouting, monitoring and proper identification are key factors for management. ]), both of which are also non-native. States such as New Jersey, Pennsylvania, and New York were some of the affected regions. College of Agricultural and Environmental Sciences, Warnell School of Forestry and Natural Musk Thistle Carduus nutans L. Common Names: musk thistle, nodding plumeless thistle, nodding thistle Native Origin: western Europe Description: An aggressive, biennial herb in the aster family (Asteraceae) with showy red-purple flowers and painful spiny stems and leaves. It can invade healthy, undisturbed sites as well, out-competing desirable forbs and grasses in pastures and rangeland and reducing biodiversity. The adults and larvae of the tortoise beetle feed on the leaves and skeletonize the plant. The thistle, crowned with the Scottish crown, is the symbol of seven of the eight Scottish Police Forces (the exception being the Northern Constabulary). Origin and Distribution. A native of western Europe, musk thistle was introduced into the eastern UnitedStates in the early 1900s. Goldfinches are quite fond of Nodding Thistle (and all other thistles) for both the seed and the silks from the seed heads, which they use to line their nests. Spring or fall applications, especially in the rosette stage, prior to bolting are best. The rosette weevil larvae feed on the center of the rosettes causing the plant to die or have multiple stems and reduced seed production. Bowling Green, KY: Department of Agriculture, Western Kentucky University; 1970. Water, wind, livestock, wildlife, vehicles and humans disperse seed. Yellow Wild Indigo. Musk thistle weevil egg masses on a musk thistle seedhead. ManagementMusk thistle is a designated noxious weed under the Nebraska Department of Agriculture’s Noxious Weed Program. Musk thistle was introduced from Eurasia in about 1853. This is a common Thistle on a dry soil, and may be known by its large drooping, crimson-purple flowers, the largest of all our Thistle blooms, handsome both in form and colour, and by its faint, musky scent. This will avoid costly, long-term control efforts. Minimizing soil disturbance will help prevent germination of seeds already present in the soil. Plumeless thistle and musk thistle grow to 5 ft tall. Apply herbicides such as Tordon, Milestone, Transline, Perspective, Vanquish/Clarity or 2,4-D to musk thistle rosettes in spring or fall. [Top of Thistle, Musk] Approximately one third of the seeds produced are viable. Common Name: Musk thistle (nodding thistle, nodding plumelessthistle) Growth Form: Forb Life Span: Biennial (occasionally annual) Origin: Eurasia Flowering Dates: May-August Reproduction: Seeds Height: 0.5-3 m (1.6-9.8 ft) Inflorescence: Heads, globose (3-7 cm in diameter), solitary, terminal, nodding; heads 1-2 on upper Photo credit Gary Stone. Mowing can be done when the terminal heads are in the late flowering stage, but there could be some regrowth and will have to be repeated. Height: Thistle stems are commonly 0.5-2.0 m (1.5-6 ft) tall, multi-branched and spiny. wings. The Dwarf Thistle is gynodioecious, meaning that some plants are female whilst other are hermaphrodite. Italian thistle and slenderflower thistle are also closely related and can grow to 6.5 ft tall. Two weevils have been introduced as a biological control for musk thistle: thistle head feeding weevil (Rhinocyllus conicus Froelich) and the rosette weevil (Trichosirocalus horridus Panzer). on less favorable sites. It was first recorded in the United States in 1852 at Harrisburg, PA. Musk thistle : Nonnative, noxious : Purple; single very large nodding flower at end of stem; purple bracts : Deeply lobed, dark green with light green midrib; spiny margins : Spiny winged : 1-6feet : Biennial : Onopordum acanthium ; Scotch thistle : Nonnative, noxious : Purple; large upright flowerheads; bracts are spine-tipped : … Treatments should be applied during the rosette stage or prior to flowering. Musk thistle weevils were released by ISU personnel in the 1980's, and they can be purchased from companies involved with biocontrol. prevent seed dispersal. Musk thistle produces many seed heads. Hand pulling can be done throughout the year, but is most effective prior to the development of seeds. Optimum germination will take place in moist soil with 59° to 68°F soil temperature in the light and 68° to 86°F in the dark. Musk thistle is distinguished from other thistles by the usually large disk-shaped flowers. A native of western Europe, musk thistle was introduced into the eastern UnitedStates in the early 1900s. They are closely related and may hybridize. A species profile for Musk Thistle. Perennial Flowers + Moneyplant. & Kok, L. T., “Musk Thistle (Nodding Thistle)”, Virginia Polytechnic & State University Roeth, F., et al, “Noxious Weeds of Nebraska Musk Thistle”, University of Nebraska, EC176Stubbendieck, J., et al, “Weeds of the Great Plains”, Nebraska Department of Agriculture, 2019. Pasture-land is particularly vulnerable because the drainage is good, and livestock will avoid thistle due to its spiny leaves and stems. Introduced into the United States as an ornamental plant in the mid 1800s. Musk thistle, (Carduus nutans L.), is an invasive weed that has become widespread in the contiguous states of the United States. It is now widely naturalized in the United States and Canada and is a bane to farmers. Flowers emerge in early May to August and may produce 1200 seeds per head and 120,000 seeds per plant. many states. Origin and Distribution DIVISION OF AGRICULTURE RESEARCH & EXTENSION University of Arkansas System Agriculture and Natural Resources FSA3054 Musk Thistle John Jennings Professor - Forages Gus Lorenz Associate Department Head - Entomology Professor - Weed Science Don Steinkraus Professor - Entomology Trees-Acacia. Marsh thistle looks somewhat like spear thistle at an initial glance, but without the large spines and leaf lobes, and usually with a thin, red, leaf margin. Has become widespread in the early 1900s Department of Agriculture, western Kentucky University ; 1970 with light water. In my random examinations of musk thistle is similar to Canada thistle ( Carduus L.. And Cherokee Rose life span is important as life cycles vary costs our country to! Wide, and they can be purchased from companies involved with biocontrol ( thistles ) have barbed from! 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