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THE PERIODICITY OF FEMALE CALLING IN THE BLUEBERRY SPANWORM ITAME ARGILLACEARIA PACK. (LEPIDOPTERA: GEOMETRIDAE)

Published online by Cambridge University Press:  31 May 2012

A. Randall Alford  and
Jennifer R. Diehl
A. Randall Alford
Affiliation:
Department of Entomology, University of Maine at Orono, Orono, ME 04469
Jennifer R. Diehl
Affiliation:
Department of Entomology, University of Maine at Orono, Orono, ME 04469
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Abstract

The calling of female blueberry spanworms occurs primarily during the first few hours of the photophase under controlled laboratory and field conditions. Peak calling occurred 2 h after lights-on at laboratory test temperatures of 20,15, and 10 °C under a light:dark regime of 16:8; duration of calling was prolonged at 10 °C. Under continuous scotophase, female calling activity free-runs at a natural periodicity of ca. 27 h. However, under continuous photophase the circadian rhythm is damped to a low level of activity but maintains a ca.24-h periodicity.

Résumé

L'appel des femelles a lieu principalement durant les premières heures de la photophase en conditions contrôlées de laboratoire et sur le terrain. Les pics d'appel se sont produits 2 h après l'ouverture des lumières aux températures de 20, 15 et 10 °C sous un régime lumière : noirceur de 16 : 8; la durée de l'appel s'est prolongée à 10 °C. En scotophase continue la périodicité de l'appel s'exprime librement à intervalles d'environ 27 h. Cependant, sous photophase continue le rythme circadien est atténué fortement mais maintient une périodicité d'environ 24 h.

Type
Articles
Information
The Canadian Entomologist , Volume 117 , Issue 5 , May 1985 , pp. 553 - 556
Copyright
Copyright © Entomological Society of Canada 1985

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