bull thistle identification

Through the app or online. ", "Food for Pollinators: Quantifying the Nectar and Pollen Resources of Urban Flower Meadows", The biology and non-chemical control Spear Thistle (, https://en.wikipedia.org/w/index.php?title=Cirsium_vulgare&oldid=987581482, Articles with dead external links from August 2017, Articles with permanently dead external links, Short description is different from Wikidata, Articles with unsourced statements from November 2020, Taxonbars with automatically added basionyms, Creative Commons Attribution-ShareAlike License, This page was last edited on 8 November 2020, at 00:02. All of the leaves are deeply lobed with a 1 cm hard and sharp spike coming out the tip of each lobe with the margins lined with smaller spikes. Comparatively, Canada thistle is a perennial that reproduces through underground rhizomes and wind-blown seeds. needle-like (e.g. Lobes on leaves are tipped with stout spines. Contaminated hay is the main source of the spread of bull thistle. Altervista Flora Italiana, Cardo asinino. Extension is expanding its online education and resources to adapt to COVID-19 restrictions. You must have JavaScript enabled in your browser to utilize the functionality of this website. About Bull Thistle: The Bull Thistle is a biennial weed that reproduces by the wind blowing their seeds. There are several herbicides that are effective on bull thistle, but it is important to carefully match the product with your site, local conditions and regulations, and other weed and land management issues, and always follow the label directions for the product you are using. It produces seeds eaten by the American goldfinch, down from seed pods that is used by those birds for nesting material, and serves as a host plant for the Painted lady butterfly. It is important that the roots are dug up and the flower stems should be properly disposed of to prevent them from forming viable seeds. Livestock do not eat it, giving it an advantage over native species. The inflorescence is 2.5–5 cm diameter, pink-purple, with all the florets of similar form (no division into disc and ray florets). [21] Spread is only by seed, not by root fragments as in the related creeping thistle C. arvense. Measure the width of … Some wild plants are poisonous or can have serious adverse health effects. To contact staff, see the Noxious Weed Control Program Directory, send an email, or call 206-477-WEED (206-477-9333). Having the areas involving Bull Thistle be grazed by sheep, goats, and/or horses may also be effective, if possible. Prevention of Bull Thistle is less expensive and less time-consuming then trying to control it. [14] The flowers are a rich nectar source used by numerous pollinating insects, including honey bees, wool-carder bees, and many butterflies. The spiny, spreading, winged stems are up to 7 ft. (2.1 m) tall. They are in rosette stage in the first year and flower and set seeds in the second year. © The tap roots can be eaten raw or cooked, but are only palatable on young thistles that have not yet flowered. nutrition, recipes, history, uses & more! It is these prickles that make the surface very harsh to the touch. It forms a four to eighteen inch wide rosette in its first year and blooms in its second year. They contain hundreds of tiny purple flowers. The flower heads are one to two inches wide and Gumdrop-shaped. Do not leave cut stems of flowering bull thistle on the ground because they are likely to form viable seed after they are cut. They can grow anywhere from 7.5 to 30 cm long. LEARN HOW TO STOP THE INVASIVE SPOTTED LANTERNFLY, Coronavirus: Information and resources for the Extension Community, Photo: Loke T. Kok, Virginia Polytechnic Institute and State University, Bugwood.org, bull thistle, Cirsium vulgare. Even horses will help by picking out many of the nectar-rish flowers and eating them before they go to seed. The leaves are stoutly spined, grey-green, deeply lobed; the basal leaves up to 15–25 cm long, with smaller leaves on the upper part of the flower stem; the leaf lobes are spear-shaped (from which the English name derives). Mechanical control: Mowed thistles will produce new branches from basal buds but close cutting or cutting twice per season will usually prevent seed production and reduce the population over time. We are not health professionals, medical doctors, nor are we nutritionists. Yield Data See All Pest, Disease and Weed Identification, See All Beer, Hard Cider, and Distilled Spirits, See All Community Planning and Engagement, Common Pokeweed Identification and Management. The stem is winged, with numerous longitudinal spine-tipped wings along its full length. It is important to know that Bull Thistle is susceptible to glyphosate and dicamba herbicides. [16] The seeds are dispersed by wind, mud, water, and possibly also by ants; they do not show significant long-term dormancy, most germinating soon after dispersal and only a few lasting up to four years in the soil seed bank. Contaminated hay is a primary means of spread of this species so be careful to purchase weed free hay or watch closely for new plants in the areas hay is kept or spread. [15] The seeds are eaten by goldfinches, linnets and greenfinches. However, it will only provide short term control due to the fact that the seeds have already set. Bull thistle is a weed that can grow in a wide range of environments but prefers disturbed areas. It is also naturalised in North America, Africa, and Australia and is an invasive weed in some areas. University of Minnesota Extension discovers science-based solutions, delivers practical education, and engages Minnesotans to build a better future. Bull thistle colonizes areas where vegetation, topsoil, or overburden is removed such as road sides, pastures and ditch banks. Young flower stems can be cooked and young leaves can be eaten in a salad or tossed into a sauté. One to several vertical branched stems form in the second year. Overgrazed pastures are susceptible to bull thistle encroachment, and it can sometimes form dense stands that reduce productivity and stocking levels. [citation needed], Species of flowering plant in the daisy family Asteraceae. a variety of reasons, including to recognize new and past website users, to customize A chemical vegetation killer can help eliminate bull thistle if mowing and pulling don't work. The supports for pollinators and pest-eating birds could outweigh its drawbacks.

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