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Notes on Insects, Especially Gymnaetron spp. (Coleoptera: Curculionidae), Associated with Toadflax, Liniaria vulgaris Mill. (Scrophulariaceae), in North America1

Published online by Cambridge University Press:  31 May 2012

J. Morris Smith
J. Morris Smith
Affiliation:
Entomology Laboratory, Belleville, Ontario
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Extract

Linaria vulgaris Mill., known commonly as toadflax or butter-and-eggs, is worldwide in its distribution but is a serious weed only in the Canadian provinces of Alberta, Saskatchewan, and Manitoba (Zilke and Coupland, 1954), where it is increasing in importance (Beck, 1954; Carder, 1956; Forbes, 1957). Smith (1956) correlated its relative insignificance as a weed in the other provinces and in the northwestern United States with the occurrence of the curculionid beetle Gylmnaetron antirrhini (Payk.). Investigations on this and other insects that feed on toadflax and an evaluation of their possible use as biological control agents are reported in this paper; also included are some observations on the weedand its natural enemies made since 1950 in all provinces west of Quebec and in the northwestern United States.

Type
Articles
Information
The Canadian Entomologist , Volume 91 , Issue 2 , February 1959 , pp. 116 - 121
Copyright
Copyright © Entomological Society of Canada 1959

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