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FURTHER OBSERVATIONS ON THE CHANGES TAKING PLACE IN THE CORN BORER POPULATION IN WESTERN ONTARIO*

Published online by Cambridge University Press:  31 May 2012

Geo. Wishart
Geo. Wishart
Affiliation:
Dominion Parasite Laboratory, Belleville, Ontario
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Extract

The seasonal history of an insect has an important relationship to the success or failure of any efforts to usr parasites in its control. In the work on parasites of thr European corn borer, Pyrausta nubilalis Hubn., over a period of years, the writer has had an opportunity to observe the changes which have taken place in the seasonal history of this insect in Western Ontario. It was shown by the writer (Wislwt, 1942, 1944) that there was a gradual and rather consistent increase in the proportion of the population which had two generations instead of one. The present paper presents further data pertinent to this subject.

Type
Articles
Information
The Canadian Entomologist , Volume 79 , Issue 5 , May 1947 , pp. 81 - 83
Copyright
Copyright © Entomological Society of Canada 1947

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References

REFERENCES

Arbuthnot, K. D.Strains of the European Corn Borer in the United States. Tech. Bull. No. 869, U. S. Dept. of Agr., March, 1944.Google Scholar
Beall, Geoffrey. Multiple Generation Pyrausta nubilalis Hubn. on Plants Other than Corn in Ontario. Seventy-fourth Ann. Rep. Ent. Soc. of Ontario, 1943.Google Scholar
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Wishart, Geo. Important Developments in the Corn Borer Parasite Situation. Seventy-third Ann. Rep. Ent. Soc. of Ontario, 1942.Google Scholar
Wishart, Geo. An Increase in the Multiple Generation of the European Corn Borer in Ontario and its relation to Parasite Establishment. Seventy-fourth Ann. Rep. Ent. Soc. of Ont., 1943.Google Scholar