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ELECTROANTENNOGRAMS FROM SPRUCE BUDWORM MOTHS (CHORISTONEURA FUMIFERANA) (LEPIDOPTERA: TORTRICIDAE) OF DIFFERENT AGES AND FOR VARIOUS PHEROMONE CONCENTRATIONS

Published online by Cambridge University Press:  31 May 2012

R.J. Ross ,
P. Palaniswamy  and
W.D. Seabrook
R.J. Ross*
Affiliation:
Department of Biology, University of New Brunswick, Fredericton E3B 5A3
P. Palaniswamy
Affiliation:
Department of Biology, University of New Brunswick, Fredericton E3B 5A3
W.D. Seabrook
Affiliation:
Department of Biology, University of New Brunswick, Fredericton E3B 5A3
*
*Address communications.
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Abstract

An electroantennogram (EAG) technique, which indicates electrochemical activity in a whole antenna, was used to study sex pheromone reception in spruce budworm moth antennae. For both males and females the EAG exhibited a phasic depolarization, reaching maximum near the end of a puff stimulation, followed immediately by repolarization which was prolonged by increasing amounts as the source concentration of the pheromone was increased. The dose–response curves for both sexes were sigmoid in shape, but they indicated that female antennae have a higher threshold and a lower peak response than that of males. Antennal response changed with age, being a regular increase and decrease for females and irregular for males.

Type
Articles
Information
The Canadian Entomologist , Volume 111 , Issue 7 , July 1979 , pp. 807 - 816
Copyright
Copyright © Entomological Society of Canada 1979

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