Trichosirocalus horridus is a species of true weevil, native to Europe. It is a biological pest control agent that was introduced into the United States in 1974 to control exotic thistles, especially in the Cirsium and Carduus genera.[2][3]
^"Trichosirocalus horridus". Integrated Taxonomic Information System.
^"Ward, R. H., R. L. Pienkowski, and L. T. Kok. 1 December 1974. Host Specificity of the First-Instar of Ceuthorhynchidius horridus a Weevil for Biological Control of Thistles. Journal of Economic Entomology. 67: 735-737". doi:10.1093/jee/67.6.735. {{cite journal}}: Cite journal requires |journal= (help)
^"Kok, L. T. 1975. Host specificity studies on Ceuthorhynchidius horridus (Panzer) (Coleoptera: Curculionidae) for the biocontrol of Musk and Plumeless thistles. Weed Res. 15: 21-25". doi:10.1111/j.1365-3180.1975.tb01091.x. {{cite journal}}: Cite journal requires |journal= (help)
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Trichosirocalushorridus is a species of true weevil, native to Europe. It is a biological pest control agent that was introduced into the United States...
tribe Ceutorhynchini of the subfamily Baridinae. Trichosirocalushorridus Panzer, 1801 Trichosirocalus troglodytes Osman Sert. "Faunistic studies on some...
solstitialis, and Trichosirocalushorridus. In the United States there has been success with Rhinocyllus conicus, Trichosirocalushorridus, and Puccinia carduorum...
unsuccessful in the Pacific Northwest. A thistle crown weevil (Trichosirocalushorridus) that feeds on musk, bull, plumeless, Italian, and creeping thistles...
set up (using the Rosette Crown Weevil, Trichosirocalus briesei). In North America, there are also Trichosirocalus control programs, but they have proved...
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