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NOTES ON TWO BORERS INJURIOUS TO THE MOUNTAIN ASH

Published online by Cambridge University Press:  31 May 2012

D. S. Kellicott
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Extract

In the late publication of the Department of Agriculture on “Foresttree Imsects” three species are mentioned as affecting the trunk of Pyrus americana, viz: The round and flat-headed apple-tree borers and an unknown longicorn larva. I have recently found two additional species fully as injurious as those mentioned. These are Podosesia syringœ and Zeuzophora semifuneralis.

Type
Articles
Information
The Canadian Entomologist , Volume 23 , Issue 11 , November 1891 , pp. 250 - 257
Copyright
Copyright © Entomological Society of Canada 1891

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