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  • Musk
  • Host speciÞcity studies on Ceuthorhynchidius horridus (Panzer) (Coleoptera: Curculionidae) for the biocontrol of Musk and Plumeless thistles. (wikipedia.org)
  • butterflies
  • Thistle flowers are favourite nectar sources of the pearl-bordered fritillary, small pearl-bordered fritillary, high brown fritillary, and dark green fritillary butterflies. (wikipedia.org)
  • Scots
  • During this operation one barefoot Norseman had the misfortune to step upon a thistle, causing him to cry out in pain, thus alerting Scots to the presence of the Norse invaders. (wikipedia.org)
  • Scotland
  • Thistle is the floral emblem of Scotland and Lorraine, as well as the emblem of the Encyclopædia Britannica. (wikipedia.org)
  • The thistle has been the national emblem of Scotland since the reign of Alexander III (1249-1286) and was used on silver coins issued by James III in 1470. (wikipedia.org)
  • It is the symbol of the Order of the Thistle, a high chivalric order of Scotland. (wikipedia.org)
  • The thistle is also the emblem of Encyclopædia Britannica, which originated in Edinburgh, Scotland. (wikipedia.org)
  • native
  • Some thistles (for example Cirsium vulgare, native to Eurasia), have been widely introduced outside their native range. (wikipedia.org)
  • Control measures include Trichosirocalus weevils, but a problem with this approach, at least in North America, is that the introduced weevils may affect native thistles at least as much as the desired targets. (wikipedia.org)
  • Scottish
  • The thistle, crowned with the Scottish crown, was the symbol of seven of the eight former Scottish Police Services (from which a new national Police Service was formed in 2013), the sole exception being the former Northern Constabulary. (wikipedia.org)
  • in the US, Carnegie Mellon University features the thistle in its crest in honour of the Scottish heritage of its founder, Andrew Carnegie. (wikipedia.org)
  • important
  • Other thistles that nominally are weeds are important honey plants, both as bee fodder in general, and as sources of luxury monofloral honey products. (wikipedia.org)
  • Natural fires are important for Hill's thistle because they burn large trees and debris, which reduces competition and allows it to grow. (wikipedia.org)
  • competition
  • Typical adverse effects are competition with crops and interference with grazing in pastures, where dense growths of spiny vegetation suppress forage plants and repel grazing animals from eating either the thistle plants or neighbouring forage. (wikipedia.org)