First documentation of adult<i>Trichosirocalus horridus</i>on several non-target native<i>Cirsium</i>species in Tennessee

Wiggins, Gregory J.; Grant, Jerome F.; Lambdin, Paris; Ranney, J.W.; Wilkerson, J. B.

doi:10.1080/09583150903191343

Cited by 5 publications

(2 citation statements)

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“…and C. muticum Michx. in Tennessee (Wiggins et al , 2009). All specimens that we have morphologically and genetically analysed from the USA are T. horridus .…”

Section: Resultsmentioning

confidence: 99%

“…In North America, T. horridus has been reared from both Carduus and Cirsium species (McAvoy et al , 1987; Takahashi et al , 2009; Wiggins et al , 2009), which suggests either the presence of two species of weevil ( T. horridus on Cirsium and T. mortadelo on Carduus ) or that at least one of the species is not as specific as Alonso-Zarazaga & Sánchez-Ruiz (2002) claimed. Furthermore, the weevils have been found on Cirsium, Carduus and Onopordum in New Zealand despite the introduction of only one population from Canada (Groenteman et al , 2008).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Genetic and morphological studies ofTrichosirocalusspecies introduced to North America, Australia and New Zealand for the biological control of thistles

Biase

Colonnelli²,

Belvedere

et al. 2015

Bull. Entomol. Res.

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Trichosirocalus horridus sensu lato has been used as a biological control agent of several invasive thistles (Carduus spp., Cirsium spp. and Onopordum spp.) since 1974. It has been recognized as a single species until 2002, when it was split into three species based on morphological characters: T. horridus, Trichosirocalus briesei and Trichosirocalus mortadelo, each purported to have different host plants. Because of this taxonomic change, uncertainty exists as to which species were released in various countries; furthermore, there appears to be some exceptions to the purported host plants of some of these species. To resolve these questions, we conducted an integrative taxonomic study of the T. horridus species complex using molecular genetic and morphological analyses of specimens from three continents. Both mitochondrial cytochrome c oxidase subunit I and nuclear elongation factor 1α markers clearly indicate that there are only two distinct species, T. horridus and T. briesei. Molecular evidence, morphological analysis and host plant associations support the synonymy of T. horridus (Panzer, 1801) and T. mortadelo Alonso-Zarazaga & Sánchez-Ruiz, 2002. We determine that T. horridus has been established in Canada, USA, New Zealand and Australia and that T. briesei is established in Australia. The former species was collected from Carduus, Cirsium and Onopordum spp. in the field, whereas the latter appears to be specific to Onopordum.

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“…and C. muticum Michx. in Tennessee (Wiggins et al , 2009). All specimens that we have morphologically and genetically analysed from the USA are T. horridus .…”

Section: Resultsmentioning

confidence: 99%