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2-Undecyloxy-1-ethanol in combination with other semiochemicals attracts three Monochamus species (Coleoptera: Cerambycidae) in British Columbia, Canada

Published online by Cambridge University Press:  11 October 2012

Jorge E. Macias-Samano ,
David Wakarchuk ,
Jocelyn G. Millar  and
Lawrence M. Hanks
Jorge E. Macias-Samano*
Affiliation:
Synergy Semiochemicals Corp., 7061 Merritt Avenue, Burnaby, British Columbia V5J 4R7, Canada
David Wakarchuk
Affiliation:
Synergy Semiochemicals Corp., 7061 Merritt Avenue, Burnaby, British Columbia V5J 4R7, Canada
Jocelyn G. Millar
Affiliation:
Department of Entomology, University of California, Riverside, California 92521, United States of America
Lawrence M. Hanks
Affiliation:
Department of Entomology, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States of America
*
1Corresponding author (e-mail: jorge@semiochemical.com).
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Abstract

Two species in the genus Monochamus Dejean (Coleoptera: Cerambycidae: Lamiinae) have recently been shown to have the same male-produced sex pheromone, 2-undecyloxy-1-ethanol (monochamol), suggesting that other congeners may share the same pheromone. We tested that hypothesis by conducting field bioassays of monochamol, in combination with bark-beetle pheromones and the host plant volatiles ethanol and α-pinene, in southern British Columbia, Canada. We captured 603 Monochamus clamator (LeConte), 63 Monochamus obtusus Casey, 245 Monochamus scutellatus (Say) (tribe Monochamini), and 42 Acanthocinus princeps (Walker) (tribe Acanthocinini). All three Monochamus species were significantly attracted to the combination of monochamol and host plant volatiles, whereas bark-beetle pheromones plus plant volatiles and plant volatiles alone were minimally attractive. Adding bark-beetle pheromones to the monochamol plus plant volatiles treatment synergised attraction of M. clamator, but not the other two Monochamus species. Acanthocinus princeps was most strongly attracted to the combination of bark-beetle pheromones and plant volatiles, and did not appear to be affected by the presence or absence of monochamol in baits. We conclude that monochamol is a likely pheromone component for the three Monochamus species, and that monochamol plus host plant volatiles is an effective attractant for these and perhaps other North American Monochamus species.

Résumé

On a démontré récemment que deux espèces du genre Monochamus Dejean (Coleoptera: Cerambycidae: Lamiinae) possédaient la même phéromone sexuelle mâle, le 2-undécyloxy-1-éthanol (monochamol), ce qui laisse croire que d'autres congénères pourraient aussi avoir cette même phéromone. Nous avons testé cette hypothèse par des bioessais de monochamol en nature en combinaison avec des phéromones de scolytes et des produits volatils de la plante-hôte, l’éthanol et l’ α-pynène, dans le sud de la Colombie-Britannique, Canada. Nous avons capturé 603 Monochamus clamator (LeConte), 63 Monochamus obtusus Casey, 245 Monochamus scutellatus (Say) (tribu des Monochamini) et 42 Acanthocinus princeps (Walker) (tribu des Acanthocinini). Les trois espèces de Monochamus sont fortement attirées par la combinaison de monochamol et de produits volatils de la plante-hôte, alors que les phéromones de scolytes additionnées de produits volatils de la plante hôte et les produits volatils de la plante hôte seuls exercent très peu d'attraction. L'addition de phéromones de scolytes à la combinaison de monochamol et de produits volatils de la plante hôte a un effet synergique d'attraction chez M. clamator, mais non chez les deux autres espèces de Monochamus. Acanthocinus princeps est le plus fortement attiré par la combinaison de phéromones de scolytes et de produits volatils de plante et ne semble pas être affecté par la présence ou l'absence de monochamol dans les appâts. Nous concluons que le monochamol est vraisemblablement l'une des composantes de la phéromone des trois espèces de Monochamus et que la combinaison de monochamol et de produits volatils de la plante hôte a un pouvoir efficace d'attraction chez ces espèces et peut-être chez d'autres espèces nord-américaines de Monochamus.

Type
Original Article
Information
The Canadian Entomologist , Volume 144 , Issue 6 , December 2012 , pp. 764 - 768
Copyright
Copyright © Entomological Society of Canada 2012

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