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ESTABLISHMENT AND SPREAD OF TETRASTICHUS JULIS (HYMENOPTERA: EULOPHIDAE), A PARASITOID OF THE CEREAL LEAF BEETLE IN ONTARIO

Published online by Cambridge University Press:  31 May 2012

D. G. Harcourt ,
J. C. Guppy  and
C.R. Ellis
D. G. Harcourt
Affiliation:
Ottawa Research Station, Agriculture Canada, Ottawa
J. C. Guppy
Affiliation:
Ottawa Research Station, Agriculture Canada, Ottawa
C.R. Ellis
Affiliation:
Department of Environmental Biology, University of Guelph, Guelph
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Abstract

Tetrastichus julis (Walker), a European larval endoparasite of the cereal leaf beetle, Oulema melanopus (L), has become widely established in southern Ontario. In 1975, rates of parasitism in 14 counties varied from 15% in the east to 95% in the west Dispersal into Ontario was natural and is attributed to extensive colonization of the parasitoid in Michigan and other parts of the U.S. midwest. Reasons for its success in Ontario are suggested.

Type
Articles
Information
The Canadian Entomologist , Volume 109 , Issue 3 , March 1977 , pp. 473 - 476
Copyright
Copyright © Entomological Society of Canada 1977

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