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THE USE OF FRASS IN THE IDENTIFICATION OF FOREST INSECT DAMAGE

Published online by Cambridge University Press:  31 May 2012

R. F. Morris
R. F. Morris
Affiliation:
Dominion Entomological Laboratory, Fredericton, N. B.
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Extract

The forest entomologist is often called upon to inspect insect defolialion late in the season at a time when the feeding stage of the defoliator is no longer present in the trees.

Type
Articles
Information
The Canadian Entomologist , Volume 74 , Issue 9 , September 1942 , pp. 164 - 167
Copyright
Copyright © Entomological Society of Canada 1942

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References

REFERENCES

1.Balch, R. E. 1938. Estimation of spruce sawfly hazard and need of salvage. Rept. Woodlands Section, Pulp & Paper Assn. of Canada.Google Scholar
2.Hodson, A. C. 1941. An ecological study of the forest tent caterpillar, Malacosoma disstria Hbn., in Northern Minnesota. Tech. Bull. 148, Univ. of Minn. Agric. Exp. Sta.Google Scholar
3.Monro, H. A. U. 1935. The ecology of the pine sawfly (Diprion simile Htg.). Unpublished thesis, McGill University.Google Scholar
4.Morris, R. F. 1940. Frass drop measurement as an index of the larval population and feeding activity of the European spruce sawfly. Unpublished thesis, New York State College of Forestry.Google Scholar