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FACTORS AFFECTING SPRUCE BUDWORM (CHORISTONEURA FUMIFERANA) (CLEM.) MATING AND MATING DISRUPTION WITH PHEROMONE IN THE LABORATORY

Published online by Cambridge University Press:  31 May 2012

B.M. Ponder ,
L.R. Kipp ,
C. Bergh ,
G.C. Lonergan  and
W.D. Seabrook
B.M. Ponder
Affiliation:
Department of Biology, University of New Brunswick, Fredericton, New Brunswick, Canada E3B 6E1
L.R. Kipp
Affiliation:
Department of Biology, University of New Brunswick, Fredericton, New Brunswick, Canada E3B 6E1
C. Bergh
Affiliation:
Department of Biology, University of New Brunswick, Fredericton, New Brunswick, Canada E3B 6E1
G.C. Lonergan
Affiliation:
Department of Chemistry, University of New Brunswick, Fredericton, New Brunswick, Canada E3B 6E1
W.D. Seabrook
Affiliation:
Department of Biology, University of New Brunswick, Fredericton, New Brunswick, Canada E3B 6E1
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Abstract

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Factors influencing spruce budworm (Choristoneura fumiferana) mating and mating suppression in an enclosed environment in the laboratory were investigated to develop a quantitative assay suited to statistical analysis. Mating in the absence of the two major components of spruce budworm sex pheromone (control) was not affected by changes in moth population density nor by increasing the experimental duration from 20 to 44 h. The proportions mated increased with an increase in the male:female ratio to 1.5:1 and when the experimental duration was prolonged to 68 h. Using a population density, sex ratio combination of 15:10 (male:female) the proportions of mated females decreased with increasing source concentrations of the two major spruce budworm sex pheromone components (95:5 E/Z-11–14-tetradecenal). This effect was diminished with increases in the population density and with extended test duration. Mating in the presence of pheromone remained lower than controls over all durations tested.

Résumé

On a fait une enquête sur les facteurs qui influencent l’accouplement et l’élimination de l’accouplement de la toudeuse de l’épinette (Choristoneura fumiferana) dans un milieu clos en laboratoire pour développer un essai qualitatif approprié aux analyses statistiques. L’accouplement en absence des deux principaux composants du pheromone sexuel (contrôle) de la toudeuse de l’épinette n’a pas été affecté par les changements dans la densité de la population du papillon de nuit, ni par l’augmentation de la durée de l’expérience de 20 en 44 h. La proportion des accouplés augmente avec une augmentation dans le ratio mâle : femelle à 1.5 : 1 et quand la durée de l’expérience a été prolongée à 68 h. Utilisant une combinaison densité de population, ratio sexuel de 15 : 10 (mâle : femelle) les proportions de femelles accouplées diminuent avec une augmentation des concentrations de source de deux principaux composants du phéromone sexuel de la toudeuse de l’épinette (95 : 5 E/Z-11–14-tétradécenal). Cet effet était diminué avec les augmentations dans la densité de population et avec une prolongation de la durées du test. L’accouplement en présence du pheromone restait inférieur aux contrôles par rapport à toutes les durée des tests.

Type
Articles
Information
The Canadian Entomologist , Volume 118 , Issue 8 , August 1986 , pp. 797 - 805
Copyright
Copyright © Entomological Society of Canada 1986

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