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SEX PHEROMONE COMPONENTS OF AN ALBERTA POPULATION OF EUROPEAN CORN BORER, OSTRINIA NUBILALIS (HBN.) (LEPIDOPTERA: PYRALIDAE)

Published online by Cambridge University Press:  31 May 2012

D.L. Struble ,
J.R. Byers ,
D.G.R. McLeod  and
G.L. Ayre
D.L. Struble
Affiliation:
Agriculture Canada Research Station, Lethbridge, Alberta, Canada T1J 4B1
J.R. Byers
Affiliation:
Agriculture Canada Research Station, Lethbridge, Alberta, Canada T1J 4B1
D.G.R. McLeod
Affiliation:
Research Institute, Agriculture Canada, London, Ontario, Canada N6A 5B7
G.L. Ayre
Affiliation:
Agriculture Canada Research Station, Winnipeg, Manitoba, Canada R3T 2M9
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Abstract

The sex pheromone components of European corn borer, Ostrinia nubilalis (Hbn.), from southern Alberta were identified in washes and extracts of abdomen tips from calling female moths. This is a Z strain population as (Z)-11- and (E)-11-tetradecenyl acetates were isolated in a ratio 100:2.4, and a corresponding synthetic blend in a ratio of 100:3 attracted males in the field. Dodecyl alcohol, tetradecyl alcohol and acetate, and (Z)-11-tetradecenol were also identified, but none of these components nor other "pheromone-like" mono-unsaturated C10 to C16 acetates had any effect on increasing the trap catches of male moths under field conditions. However, the addition of (Z)-9-dodecenyl acetate or (Z)-9-tetradecenyl acetate to the synthetic pheromone blend significantly reduced the capture of male moths, even though these compounds were not detectable in the female extracts. Pheromone blends used for monitoring the Z strain of the European corn borer must be essentially free, ca.< 0.1%, of these acetates. A commercially available, sticky-surface, delta-type trap was the most satisfactory of several tested for capturing moths under prairie conditions.

Résumé

Les composantes de la phéromone sexuelle de la pyrale du maïs, Ostrinia nubilalis (Hbn.), du sud de l’Alberta ont été identifiées dans des eaux de lavage et des extraits d’extrémités abdominales de papillons femelles réceptifs. C’est une lignée Z car des acétates de (Z)-11 et de (E)-11-tétradécényle ont été isolés à raison de 100 : 2,4, et un mélange synthétique correspondant à raison de 100 : 3 a attiré des mâles sur le terrain. L’alcool dodécylique, l’alcool et l’acétate tétradécyliques et l’alcool (Z)-11-tétradécénylique ont également été identifiés, mais aucun de ces constituants ni d’autres acétates "phéromonoïdes" mono-insaturés C10 à C16 n’a d’effet sur l’augmentation des captures au piège de papillons mâles sur le terrain. Toutefois, l’addition d’acétate de (Z)-9-dodécénylique ou d’acétate de (Z)-9-tétradécénylique au mélange de phéromone synthétique réduit significativement la capture de papillons mâles, même si ces composés ne sont pas détectables dans les extraits femelles. Les mélanges de phéromones utilisés pour l’étude de la lignée Z de la pyrale du maïs doivent être pratiquement exempts, approximativement < 0,1%, de ces acétates. Un piège collant de type delta disponible dans le commerce s’avère le plus satisfaisant des nombreux pièges testés pour capturer des papillons dans les conditions des Prairies canadiennes.

Type
Articles
Information
The Canadian Entomologist , Volume 119 , Issue 3 , March 1987 , pp. 291 - 299
Copyright
Copyright © Entomological Society of Canada 1987

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