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On a new Method of ascertaining the Parasites of the respective Host-Insects in a mixed Infestation

Published online by Cambridge University Press:  10 July 2009

Ivar Trägårdh
Ivar Trägårdh
Affiliation:
Swedish Institute of Experimental Forestry, Entomological Department, Experimentalfältet, Sweden.
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Extract

When studying the injurious insects of a plant it is, as a rule, easy when several insects occur together to isolate them and breed them separately in order to ascertain their parasites. In some instances, however, this method is unworkable, and this applies particularly to the often very complicated fauna of the cones of the coniferous trees.

Type
Original Articles
Information
Bulletin of Entomological Research , Volume 9 , Issue 1 , October 1918 , pp. 75 - 79
Copyright
Copyright © Cambridge University Press 1918

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References

* Investigations into the insects injurious to spruce and vine cones.—Report of the Swedish Institute of Experimental Forestry, vol. 13–14, pp. 1141–1204, 44 figs.—Stockholm, 1913.Google Scholar