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THE ROLE OF PARASITES IN THE CONTROL OF THE EUROPEAN CORN BORER, OSTRINIA NUBILALIS (LEPIDOPTERA: PYRALIDAE), IN SOUTHWESTERN ONTARIO

Published online by Cambridge University Press:  31 May 2012

H. B. Wressell
Affiliation:
Research Station, Canada Department of Agriculture, Harrow, Ontario

Abstract

Surveys, from 1948 to 1964, showed that parasites were of minor importance in controlling the European corn borer, Ostrinia nubilalis (Hübner), in extreme southwestern Ontario. Of the three species that became established, Lydella grisescens Robineau-Desvoidy was the most widespread and the most important. Eriborus terebrans (Gravenhorst) showed considerable buildup in parts of Essex County after discovery there in 1957, and Sympiesis viridula (Thomson) was found widely dispersed, but low in density, throughout the survey area. There is an indication that parasites might be of greater importance in areas where the second-generation borer is increasing.

Type
Articles
Copyright
Copyright © Entomological Society of Canada 1973

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