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EFFECTS OF LIGHT INTENSITY ON THE FLIGHT PATTERN OF TWO GNATHOTRICHUS (COLEOPTERA: SCOLYTIDAE) SPECIES1

Published online by Cambridge University Press:  31 May 2012

J. A. Rudinsky  and
I. Schneider
J. A. Rudinsky
Affiliation:
Department of Entomology, Oregon State University, Corvallis
I. Schneider
Affiliation:
Department of Entomology, Oregon State University, Corvallis
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Abstract

Studies in a Douglas-fir stand showed that the crepuscular flight pattern of Gnathotrichus retusus (Lec.) and G. sulcatus (Lec.) depends upon an interaction of light intensity and temperature. After the primary temperature threshold of 58°F is reached, light intensities above 2,000 ft-c retard flight activity, while both higher light intensity and darkness terminate flight.

Type
Articles
Information
The Canadian Entomologist , Volume 101 , Issue 12 , December 1969 , pp. 1248 - 1255
Copyright
Copyright © Entomological Society of Canada 1969

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References

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