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Thistle Seedhead Weevil - Rhinocyllus conicus
General Description
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Observations in Montana Natural Heritage Program Database
Number of Observations: 16
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Relative Density
Recency
(Observations spanning multiple months or years are excluded from time charts)
Management
Stewardship Responsibility
References
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Corr, D.R. 1988. Effects of stress inducing factors on musk thistle (Carduus nutans L,) including--grass competition, Rhinocyllus conicus Froel., terminal flower loss, and insecticides. M.Sc. Thesis. Bozeman, MT: Montana State University. 86 p.- De Smet-Moens, H. 1982. The insect fauna of Canada Thistle Cirsium arvense (L.) Scop in southern Montana. M.Sc. Thesis. Bozeman, MT: Montana State University. 51 p.
- Louda, S.M. 1998. Population growth of Rhinocyllus conicus (Coleoptera: Curculionidae) on two species of native thistles in prairie. Environmental Entomology 27(4): 834-841.
- Louda, S.M. and A.E. Arnett. 2000. Predicting non-target ecological effects of biological control agents: evidence from Rhinocyllus conicus. Proceedings of the X International Symposium on Biological Control of Weeds. 4-14 July 1999. Montana State Univers
- McDermott, G.J. 1991. Determination of host races in three insect species attacking Dalmation toadflax and yellow toadflax in North America. M.Sc. Thesis.Bozeman, MT: Montana State University. 43 p.
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