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BIOLOGY AND BEHAVIOR OF ZIMMERMAN PINE MOTH, DIORYCTRIA ZIMMERMANI, IN MICHIGAN1

Published online by Cambridge University Press:  31 May 2012

R. B. Carlson  and
J. W. Butcher
R. B. Carlson
Affiliation:
Department of Entomology, Michigan State University, East Lansing
J. W. Butcher
Affiliation:
Department of Entomology, Michigan State University, East Lansing
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Abstract

This paper reports on studies of biology and life history of the Zimmerman pine moth, Dioryctria zimmermani (Grote), in southern Michigan.

Adults emerged during the last 3 weeks of August and eggs hatched through mid-September. Eggs were laid almost entirely on the main stem and, upon hatching, the larvae entered recesses in the bark and spun hibernacula, ostensibly without feeding.

Studies on the vertical distribution of larvae and pupae showed a fairly uniform distribution over the main stem in spring and early summer. In late summer, a larger percentage was found in middle whorls.

Based on head capsule measurements, it is tentatively proposed that there are six larval stadia. Occurrence of parasitism in the last larval stadia is discussed, and a new egg parasite is reported.

The presence of D. abietivorella Grote in the study areas is noted, and discussed briefly.

Type
Articles
Information
The Canadian Entomologist , Volume 99 , Issue 5 , May 1967 , pp. 529 - 536
Copyright
Copyright © Entomological Society of Canada 1967

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References

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