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FACTORS INFLUENCING THE EFFICIENCY OF PHEROMONE-BAITED TRAPS FOR THREE SPECIES OF AMBROSIA BEETLES (COLEOPTERA: SCOLYTIDAE)

Published online by Cambridge University Press:  31 May 2012

B. S. Lindgren ,
J. H. Borden ,
L. Chong ,
L. M. Friskie  and
D. B. Orr
B. S. Lindgren
Affiliation:
Department of Biological Sciences, Simon Fraser University, Burnaby, British Columbia V5A 1S6
J. H. Borden
Affiliation:
Department of Biological Sciences, Simon Fraser University, Burnaby, British Columbia V5A 1S6
L. Chong
Affiliation:
Department of Biological Sciences, Simon Fraser University, Burnaby, British Columbia V5A 1S6
L. M. Friskie
Affiliation:
Department of Biological Sciences, Simon Fraser University, Burnaby, British Columbia V5A 1S6
D. B. Orr
Affiliation:
Department of Biological Sciences, Simon Fraser University, Burnaby, British Columbia V5A 1S6
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Abstract

The optimal release rate of the aggregation pheromone, lineatin, for trapping Trypodendron lineatum (Olivier) was 40 μg/24h. Sticky vane traps were more efficient than three other trap types for T. lineatum and Gnathotrichus retusus (LeConte). For G. sulcatus (LeConte), a multiple funnel trap was more efficient than a sticky cylinder trap but no better than vane traps or Scandinavian drainpipe traps. Placement of bait in the middle or bottom of drainpipe traps increased their efficiency in capturing T. lineatum and G. sulcatus. Multiple funnel traps and drainpipe traps releasing lineatin at 10 μg/24h, with an additional dispenser releasing lineatin at 30 μg/24h 1.5–2 m away from the trap caught more T. lineatum than traps releasing lineatin at 10 μg/24h, and were as efficient as traps releasing the pheromone at 40 μg/24h. Thus, the beetles respond strongly to the trap silhouette once attracted to its vicinity. In late April traps placed 15–25 m inside the forest margin caught more T. lineatum than traps at the margin, probably intercepting overwintering beetles before they left the forest. A few strategically placed vane traps among numerous multiple funnel or drainpipe traps are recommended for mass trapping of ambrosia beetles in timber processing areas.

Résumé

La vitesse optimale de libération de la phéromone d'aggrégation linéatine, pour la capture du Trypodendron lineatum (Olivier), s'est avérée être de 40 μg/24h. Des pièges à ailettes engluées ont été plus efficaces que 3 autres types de pièges pour le T. lineatum et le Gnathotrichus retusus (LeConte). Pour le G. sulcatus (LeConte), un piège à entonnoirs multiples s'est montré plus efficace qu'un piège de type cylindre englué, bien que non supérieur aux pièges à ailettes ou aux pièges à tuyaux de drainage scandinaves. L'inclusion d'un appât au milieu ou au fond des pièges à tuyaux a augmenté leur efficacité de capture pour le T. lineatum et le G. sulcatus. Des pièges à entonnoirs multiples et des pièges à tuyaux libérant la linéatine à 10 μg/24h, et munis d'une source additionnelle libérant la linéatine à 30 μg/24h, située à 1.5–2 m du piège, ont capturé plus de T. lineatum que les pièges libérant la linéatine à 10 μg/24h, et se sont montrés aussi efficaces que les pièges libérant la phéromone à 40 μg/24h. Ainsi les scolytes répondent fortement à la silhouette du piège une fois attirés dans son voisinage. Tard en avril, des pièges placés 15–25 m à l'intérieur de la bordure du bois ont capturé plus de T. lineatum que ceux situés en bordure, probablement en interceptant des insectes hivernants avant leur sortie de la forêt. Il est recommandé d'utiliser quelques pièges à ailettes placés de façon stratégique parmi plusieurs pièges à entonnoirs multiples et à tuyaux, pour le piégeage en masse des scolytes du bois dans les régions entourant les sites de conversion du bois.

Type
Articles
Information
The Canadian Entomologist , Volume 115 , Issue 3 , March 1983 , pp. 303 - 313
Copyright
Copyright © Entomological Society of Canada 1983

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