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EFFECTS OF BLENDS OF SEX PHEROMONE ISOMERS ON MATING AND ELECTROANTENNOGRAMS OF SPRUCE BUDWORM (LEPIDOPTERA: TORTRICIDAE)

Published online by Cambridge University Press:  31 May 2012

R. J. Ross ,
W. D. Seabrook ,
G. C. Lonergan ,
P. Palaniswamy  and
B. Ponder
R. J. Ross
Affiliation:
University of New Brunswick, Fredericton, New Brunswick E3B 5A3
W. D. Seabrook
Affiliation:
University of New Brunswick, Fredericton, New Brunswick E3B 5A3
G. C. Lonergan
Affiliation:
University of New Brunswick, Fredericton, New Brunswick E3B 5A3
P. Palaniswamy
Affiliation:
University of New Brunswick, Fredericton, New Brunswick E3B 5A3
B. Ponder
Affiliation:
University of New Brunswick, Fredericton, New Brunswick E3B 5A3
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Abstract

Male and female laboratory reared spruce budworm moths, Choristoneura fumiferana (Clem.), were placed in cages in a conifer forest, and the surrounding air permeated by each of four blends of the E and Z isomers of the sex pheromone (11-tetradecenal) at two concentrations. Mating suppression of 53–83% was found for each blend tested. At one concentration the four suppressions were similar, while at the other only one was significantly different. Electroantennograms (EAGs) were obtained from male moths for each of six E:Z blends at four concentrations. EAGs were similar for most blends at a given concentration, but tended to be larger than at a blend of 0E:100Z.

These results were discussed using a current hypothesis on the ability of males to detect sex pheromone in air containing pockets of different isomeric blends.

Résumé

Des mâles et femelles de Choristoneura fumiferana (Clem.) élevées au laboratoire ont été mises en cage dans un boisé de conifères, et 4 mélanges des isomères E et Z de la phéromone sexuelle (11-tetradecenal) a 2 concentrations ont été incorporés à l'air ambiant. L'accouplement fut supprimé dans des proportions de 53–83% par les mélanges testés. A l'une des concentrations, les niveaux de suppression étaient similaires alors qu'à l'autre, l'un d'entre eux seulement était significativement différent. Des électroantennogrammes (EAG) de mâles ont été obtenus pour 6 mélanges E: Z à 4 concentrations. Les EAG se sont avérés similaires pour la plupart des mélanges à une concentration donnée, mais montraient une tendance à être plus élevés que pour un mélange 0E: 100Z.

Ces résultats sont interprétés en rapport avec l'hypothèse voulant que les mâles puissent détecter la phéromone sexuelle dans de l'air contenant des poches de mélanges isomériques différents.

Type
Articles
Information
The Canadian Entomologist , Volume 114 , Issue 12 , December 1982 , pp. 1143 - 1149
Copyright
Copyright © Entomological Society of Canada 1982

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References

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