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SAWFLY BIOLOGIES NO. 2, HEMICHROA CROCEA GEOFFROY

Published online by Cambridge University Press:  31 May 2012

Geo. R. Hopping
Geo. R. Hopping
Affiliation:
Vernon, British Columbia
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Extract

In 1932, severe defoliation of alders (Alnus rubra Bong.) in Stanley Park, Vancouver, drew attention to a sawfly, Hemichroa crocea Geoff., which was responsible for the damage. More extensive infestations have occurred during the past six years on alder in the lower Fraser Valley. In Europe, the species has been known for a long time as a defoliator of various species of alder (W. Konow, Chalastogastra, 1901-1905). In 1936, R. Glendenning of Agassiz, B. C. said in a letter that he had found the larvae causing some injury to cultivated filberts.

Type
Articles
Information
The Canadian Entomologist , Volume 69 , Issue 11 , November 1937 , pp. 243 - 249
Copyright
Copyright © Entomological Society of Canada 1937

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References

* The Hymenopterous larval parasites were determined by Mr. G. S. Walley, the dipterous parasiteB. selecta by Dr. O. Peck, of the Systematic Division, Dominion Entomological Branch.