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A NOTE ON TRENDS IN POPULATIONS OF SEMIOTHISA SEXMACULATA (LEPIDOPTERA: GEOMETRIDAE), WITH COMMENTS ON A RECENT PAPER BY BERGERON AND BUCKNER ON THE SAME TOPIC

Published online by Cambridge University Press:  31 May 2012

W. G. H. Ives
W. G. H. Ives
Affiliation:
Northern Forest Research Centre, Canadian Forestry Service, Edmonton, Alberta
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Extract

The trapping devices used in sampling larch sawfly populations (Ives et al. 1968) caught other species of insects as well. The oil traps gave information on the relative abundance of any insects that dropped from the trees to pupate or spin cocoons. One of the more common species trapped in this way, apart from the larch sawfly, was the green larch looper, Semiothisa sexmaculata Packard. It is a solitary-feeding geometrid, and although its seasonal development tends to be later than the larch sawfly, the numbers caught provide some indication of relative abundance from year to year.

Type
Articles
Information
The Canadian Entomologist , Volume 108 , Issue 7 , July 1976 , pp. 783 - 784
Copyright
Copyright © Entomological Society of Canada 1976

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References

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