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FRONTALIN ATTRACTANT IN STANDS INFESTED BY THE SPRUCE BEETLE, DENDROCTONUS RUFIPENNIS (COLEOPTERA: SCOLYTIDAE)

Published online by Cambridge University Press:  31 May 2012

E. D. A. Dyer
E. D. A. Dyer
Affiliation:
Pacific Forest Research Centre, Canadian Forestry Service, Victoria, British Columbia
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Abstract

Field trials of the synthetic bark-beetle pheromone frontalin demonstrated that lines of single, baited spruce trees, in or near Dendroctonus rufipennis infestations, resulted in concentrated beetle attacks on trees in a strip 2 chains (40 m) wide on either side of the lines of baited trees. Pre-flight insecticide (Lindane) application killed the beetles and prevented tree mortality. Post-attack arboricide (Silvisar) treatment killed most parent beetles and brood under the bark. A predator, Thanasimus undatulus, also was aggregated at frontalin-baited trees. This application of pheromone shows promise of becoming a forest management tool to concentrate beetle attacks in partly infested stands prior to logging.

Résumé

Des essais en forêt de la frontaline, phérormone synthétique des Scolytes, ont montré que l’appâtement de rangées isolées d’Épinettes à l’intérieur ou au voisinage des zones d’infesta-tion avait pour effet de concentrer les attaques des Scolytes sur les arbres situés dans une bande de 2 chaines (40 m) de largeur de part et d’autres des lignes des arbres appâtés. L’application d’insecticide avant leur vol tuait les Scolytes, prévenant ainsi la mortalité des arbres. Le traitement arboricide postérieurement à l’attaque tuait la plupart des insectes géniteurs ainsi que le couvain sous l’écorce. Un prédateur, Thanasimus undatulus s’était également rassemblé dans les arbres appâtés à la frontaline Cette application de phérormone s’avère un instrument prometteur dans l’aménagement des forêts, à l’effet de concentrer les attaques des insectes dans des peuplements partiellement infestés avant coupe.

Type
Articles
Information
The Canadian Entomologist , Volume 107 , Issue 9 , September 1975 , pp. 979 - 988
Copyright
Copyright © Entomological Society of Canada 1975

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