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DISTRIBUTION OF CHRYSOLINA SPP. (COLEOPTERA: CHRYSOMELIDAE) IN EASTERN ONTARIO, 18 YEARS AFTER THEIR INITIAL RELEASE

Published online by Cambridge University Press:  31 May 2012

Paul G. Fields ,
John T. Arnason  and
Bernard J.R. Philogène
Paul G. Fields
Affiliation:
Department of Biology, University of Ottawa, Ottawa, Ontario, Canada K1N 6N5
John T. Arnason
Affiliation:
Department of Biology, University of Ottawa, Ottawa, Ontario, Canada K1N 6N5
Bernard J.R. Philogène
Affiliation:
Department of Biology, University of Ottawa, Ottawa, Ontario, Canada K1N 6N5
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Extract

Hypericum perforatum L., St. John's - wort (Hypericaceae), is a cosmopolitan weed that, when eaten by livestock, causes photodermatitis, reduced weight gain, and, in extreme cases, death (Giese 1980). Chrysolina hyperici (Forester) and Chrysolina quadrigemina (Suffr.) (Coleoptera: Chrysomelidae) dramatically reduced populations of H. perforatum when introduced into Australia (Clark 1953) and the United States (Holloway and Huffaker 1951; Holloway 1957). These species also have served as effective biocontrol agents when introduced into central British Columbia (Smith 1958), Ontario, and Nova Scotia (Harris and Maw 1984). This paper surveys the distribution of Chrysolina spp. in eastern Ontario, 18 years after initial release of both species.

Type
Articles
Information
The Canadian Entomologist , Volume 120 , Issue 10 , October 1988 , pp. 937 - 938
Copyright
Copyright © Entomological Society of Canada 1988

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References

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