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THE EUROPEAN SPRUCE SAWFLY OUTBREAK IN 1935

Published online by Cambridge University Press:  31 May 2012

R. E. Balch
R. E. Balch
Affiliation:
Fredericton, N. B.
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Extract

Serious defoliation of spruce by a sawfly was discovered in the interior of the Gaspe peninsula, P.Q., in the autumn of 1930. The following year an aeroplane survey indicated that some 2,000 square miles of forest was heavily attacked. The species had not previously been recorded from America and was determined as Dipirion polytomum Hartig, which has been known for over 1OO years in parts of Europe but has caused little or no damage there.

Type
Articles
Information
The Canadian Entomologist , Volume 68 , Issue 2 , February 1936 , pp. 23 - 31
Copyright
Copyright © Entomological Society of Canada 1936

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References

(1) Entomologist-in-charge, Dominien Entomological Laboratory, Fredericton, N. B.

(2) 64th Ann. Rept. Ent. Soc. of Ontario, 1933.

(3) The European Spruce Sawfly. Special Circular, Entomological Branch, Ottawa. March, 1934.