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Studies on the biological control of the spruce budworm, Cacoccia fumiferana Clemens, in southeastern Manitoba and northwestern Ontario

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dc.contributor.author Lejeune, Raymond Rene en_US
dc.date.accessioned 2009-12-01T16:52:21Z
dc.date.available 2009-12-01T16:52:21Z
dc.date.issued 1939 en_US
dc.identifier ocm72787167 en_US
dc.identifier.uri http://hdl.handle.net/1993/3405
dc.description.abstract The spruce budworm, Cacoecia fumiferanca is a native insect which has exacted an enormous unestimated toll from the Jack pine forests of southeastern Manitoba and north- western Ontario during the past five years. The history of this present epidemic is somewhat obscure, but it is quite possible that it originated in Michigan or Minnesota. Graham (1925 and 1928) reported two evidently distinct biological races of spruce budworm from Minnesota, one on spruce and balsam and the other on Jack pine. These are apparently the first published records of this insect causing serious defoliation of Jack pine. In all probability this biological race on pine spread northward and westward into Canada. During 1938 this infestation increased to record proportions in the Jack pine regions of southern Manitoba and northwestern Ontario. Epidemic conditions now obtain throughout this country eastward to Port Arthur and south to Fort Frances and into Minnesota... en_US
dc.format.extent 17599122 bytes
dc.format.mimetype application/pdf
dc.language en en_US
dc.language.iso en_US
dc.rights The reproduction of this thesis has been made available by authority of the copyright owner solely for the purpose of private study and research, and may only be reproduced and copied as permitted by copyright laws or with express written authorization from the copyright owner. en_US
dc.title Studies on the biological control of the spruce budworm, Cacoccia fumiferana Clemens, in southeastern Manitoba and northwestern Ontario en_US
dc.degree.discipline Entomology en_US
dc.degree.level Master of Science (M.Sc.) en_US


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