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IDENTIFICATION OF SEX PHEROMONE COMPONENTS FOR TWO LEPIDOPTERAN DEFOLIATORS, THE OAK OLETHREUTID LEAFROLLER, PSEUDEXENTERA SPOLIANA (CLEMENS), AND THE ASPEN LEAFROLLER, PSEUDEXENTERA OREGONANA (WALSINGHAM)

Published online by Cambridge University Press:  31 May 2012

G.G. Grant ,
B. Pendrel ,
K.N. Slessor ,
X.Z. Meng  and
W.E. Miller
G.G. Grant
Affiliation:
Forestry Canada, Forest Pest Management Institute, PO Box 490, Sault Ste. Marie, Ontario, Canada P6A 5M7
B. Pendrel
Affiliation:
Forestry Canada, Maritimes Region, PO Box 4000, Fredericton, New Brunswick, Canada E3B 5P7
K.N. Slessor
Affiliation:
Department of Chemistry, Simon Fraser University, Burnaby, British Columbia, Canada V5A 1S6
X.Z. Meng
Affiliation:
Department of Chemistry, Simon Fraser University, Burnaby, British Columbia, Canada V5A 1S6 [On leave from Institute of Zoology, Academia Sinica, Beijing, China]
W.E. Miller
Affiliation:
Department of Entomology, University of Minnesota, St. Paul, Minnesota, USA 55108
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Abstract

Moths of the genus Pseudexentera are early-season fliers that include three species of economic importance: P. spoliana (Clemens) on oak (Quercus), P. oregonana (Walsingham) on aspen (Populus), and P. mali Freeman on apple (Malus). GC and GC/MS analysis, EAG and behavioral bioassays, and field tests confirmed that Z10-16:Ac is an attractive sex pheromone component of female P. spoliana. Capillary GC analysis supported by GC/MS also indicated the presence of 16:Ac, Z10-16:OH, and 16:OH in pheromone extracts and there was tentative GC evidence for Z12-16:Ac. However, addition of these compounds to Z10-16:Ac in various blends did not enhance male attraction. The major sex pheromone component of female P. oregonana is Z8-14:Ac. There was also GC and GC/MS evidence for Z8-14:OH and tentative GC evidence for 14:Ac in the pheromone of this species. Their addition to Z8-14:Ac failed to increase moth catches in baited traps. Pseudexentera mali males were attracted by Z,Z-8,10-16:Ac, a previously reported sex pheromone of this species. Pheromone lures targeted for each species were not cross-attractive.

Résumé

Les papillons du genre Pseudexentera sont des insectes hâtifs dont trois espèces ont une grande importance économique : P. spoliana (Clemens) sur les chênes (Quercus), P. oregonana (Walsingham) sur les trembles (Populus) et P. mali Freeman sur les pommiers (Malus). Diverses méthodes d’analyses, CG (chromatographie en phase gazeuse), CG/SM (chromatographie en phase gazeuse combinée à la spectrométrie de masse), de même que des tests de EAG et de comportement et des tests en nature ont permis de confirmer que le Z10-16 : Ac constitue une composante très attirante de la phéromone sexuelle chez la femelle de P. spoliana. L’analyse chromatographique (CG capillaire), appuyée par les résultats des méthodes combinées CG/SM, a également confirmé la présence de 16 : Ac, Z10-16 : OH et 16 : OH dans les extraits de phéromone et la chromatographie CG semble indiquer aussi la présence de Z12-16 : Ac. Cependant, l’addition de ces composés au Z10-16 : Ac en différentes combinaisons ne semble pas augmenter le pouvoir d’attraction de mâles. La principale composante de la phéromone sexuelle de la femelle de P. oregonana est le Z8-14 : Ac. Les analyses par CG et CG/SM indiquent aussi la présence de Z8-14 : OH et la chromatographie CG semble indiquer peut-être aussi la présence de 14 : Ac dans la phéromone de cette espèce. Leur addition au Z8-14 : Ac n’a toutefois pas augmenté le nombre de captures dans les pièges garnis. Les mâles de P. mali étaient attirés par le Z,Z-8,10-16 : Ac, une phéromone déjà signalée chez cette espèce. Des appâts garnis des phéromones spécifiques à chaque espèce n’attiraient pas les mâles des autres espèces.

[Traduit par la rédaction]

Type
Articles
Information
The Canadian Entomologist , Volume 123 , Issue 6 , December 1991 , pp. 1209 - 1218
Copyright
Copyright © Entomological Society of Canada 1991

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