NOTES ON THE INTRODUCTION OF DIPRION PARASITES TO CANADA

L. R. Finlayson; W. A. Reeks

doi:10.4039/Ent68160-7

Extract

Preliminary study of the outbreak of the European spruce sawfly (Diprion polytomum Htg.) in the Gaspe Peninsula, undertaken in 1931 by the Division of Forest Insects, showed that the extent of the infestation was such that the sawfly could not be economically controlled by chemical or mechanical means. It was found, also, that the sawfly was not attacked by parasites.

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NOTES ON THE INTRODUCTION OF DIPRION PARASITES TO CANADA

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