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Chemical identification and behavioral activity of (Z)-11-tetradecenal in an eastern North American population of the obliquebanded leafroller

Published online by Cambridge University Press:  31 May 2012

Ashraf M. El-Sayed ,
H.M. Fraser  and
R.M. Trimble
Ashraf M. El-Sayed*
Affiliation:
Southern Crop Protection and Food Research Centre, Agriculture and Agri-Food Canada, Vineland Station, Ontario, Canada L0R 2E0
H.M. Fraser
Affiliation:
Southern Crop Protection and Food Research Centre, Agriculture and Agri-Food Canada, Vineland Station, Ontario, Canada L0R 2E0
R.M. Trimble
Affiliation:
Southern Crop Protection and Food Research Centre, Agriculture and Agri-Food Canada, Vineland Station, Ontario, Canada L0R 2E0
*
1 Author to whom all correspondence should be addressed.
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Abstract

The sex pheromone of the obliquebanded leafroller, Choristoneura rosaceana (Harris) (Lepidoptera: Tortricidae), from the Niagara Peninsula, Ontario, was investigated using chemical analysis, GC–EAD, and field trapping experiments. The pheromone gland contained: (Z)-11-tetradecenyl acetate (Z11-14:Ac), (E)-11-tetradecenyl acetate (E11-14:Ac), (Z)-11-tetradecen-1-ol (Z11-14:OH), and (Z)-11-tetradecenal (Z11-14:Al). The average amounts of Z11-14:Ac, E11-14:Ac, Z11-14:OH, andZ11-14:Al were 40.40, 0.83, 0.47, and 0.13 ng/female, respectively. Eight other structurally related compounds, (E)-11-tetradecenal (E11-14:Al), (E)-11-tetradecen-1-ol (E11-14:OH), pentadecan-2-one (15-2kt), hexadecanal (16:Al), hexadecan-1-ol (16:OH), heptadecan-2-one (17-2kt), octadecanal (18:Al), and octadecyl acetate (18:Ac), were also identified. In a field trapping experiment, adding Z11-14:Al to lures containing a 100:3:5 blend of Z11-14:Ac, E11-14:Ac, and Z11-14:OH in an amount equal to 2% of the main component significantly increased the number of moths captured in apple, Malus domestica (Borkh.) (Rosaceae), orchards. The removal of Z11-14:Al from lures containing a 100:2:1.5:1 blend of Z11-14:Ac, E11-14:Ac, Z11-14:OH, and Z11-14:Al resulted in a > 50% reduction in the average total number of moths captured in a trap. This study provides the first evidence that Z11-14:Al is present in the pheromone of an eastern North American population of C. rosaceana.

Résumé

La phéromone sexuelle de la Tordeuse à bandes obliques, Choristoneura rosaceana (Harris) (Lepidoptera : Tortricidae), a été étudiée chez une population de la péninsule du Niagara, Ontario, au moyen d’analyses chimiques, de tests électrophysiologiques GC–EAD (chromatographie en phase gaseuse – détection électroantennographique) et d’expériences de piégeage en nature. La glande à phéromone contient de l’acétate de (Z)-11-tétradécényle (Z11-14 : Ac), de l’acétate de (E)-11-tétradécényle (E11-14 : Ac), du (Z)-11 -tétradécén-1-ol (Z11-14 : OH) et du (Z)-11-tétradécénal (Z11-14 : Al). Les quantités moyennes de Z11-14 : Ac, de E11-14 : Ac, de Z11-14 : OH et de Z11-14 : Al ont été évaluées respectivement à 40,40, 0,83, 0,47 et 0,13 ng/femelle. Huit composés apparentés par leur structure, le (E)-11-tétradécénal (E11-14 : Al), le (E)-11-tétradécén-1-ol (E11-14 : OH), le pentadécan-2-one (15-2kt), l’hexadécanal (16 : Al), l’hexadécan-1-ol (16 : OH), l’heptadécan-2-one(17-2kt), l’octadécanal (18 : Al) et l’acétate d’octadécyle (18 : Ac) ont également été identifiés. Au cours d’une expérience de piégeage, l’addition de 2% de Z11-14 : Al aux leurres contenant un mélange 100 : 3 : 5 de Z11-14Ac, de E11-14 : Ac et de Z11-14 : OH a fait augmenter significativement le nombre de tordeuses capturées dans les vergers de pommiers, Malus domestica (Borkh.) (Rosaceae). Le retrait de Z11-14 : Al des leurres contenant un mélange 100 : 2 : 1,5 : 1 de Z11-14 : Ac, de E11-14 : Ac, de Z11-14 : OH et de Z11-14 : Al entraîne une réduction de plus de 50% du nombre total moyen de tordeuses capturées par un piège. C’est la première fois que la présence de Z11-14 : Al est signalée dans la phéromone d’une population de l’est nord-américain de C. rosaceana.

[Traduit par la Rédaction]

Type
Articles
Information
The Canadian Entomologist , Volume 133 , Issue 3 , June 2001 , pp. 365 - 374
Copyright
Copyright © Entomological Society of Canada 2001

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