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A New Type of Coprometer for Laboratory and Field Use1

Published online by Cambridge University Press:  31 May 2012

G W. Green  and
W. R. Henson
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Extract

It is often desirable to establish the relationship between the amount of feeding of an insect and the prevailing meteorological conditions. With colonial insects, especially, it is difficult to determine visually whether members of a colony are feeding heavily, moderately, or lightly. If periodic measurements of frass drop are made, more reliable information may be obtained, for such measurements have proved to be reliable indicators of the intensity of feeding (Gornitz (1933); Monro (1935; Morris (1949), and Taranukha (1937)).

Type
Articles
Information
The Canadian Entomologist , Volume 85 , Issue 6 , June 1953 , pp. 227 - 230
Copyright
Copyright © Entomological Society of Canada 1953

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References

Literature Cited

Gornitz, K., Methoden zur Prüfung von Pflanzenschutzmitteln. IV. Neue Apparate und Methoden. 5. Apparate zur Messung des Kotfalls von Insekten. Mitt. Biol. Reichsanst. Land.-u. Forstw., 46: 38–58, 1933.Google Scholar
Monro, H. A. U., The ecology of the pine sawfly (Diprion simile Htg.) Unpublished thesis, McGill University, 1935.Google Scholar
Morris, R. F., Frass-drop measurements in studies of the European spruce sawfly. Univ. Mich. School For. Conser. Bull. 12, 1949.Google Scholar
Taranukha, M. D., Methods for determining the feeding rates of Porthetria dispar L. Trav. Instit. Zool. Biol. Acad. Sci. Ukr., 14:43–109, 1937.Google Scholar