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THE USE OF PHEROMONE AND BARRIER TRAPS TO MONITOR SAN JOSE SCALE (HOMOPTERA: DIASPIDIDAE) PHENOLOGY IN THE OKANAGAN VALLEY OF BRITISH COLUMBIA

Published online by Cambridge University Press:  31 May 2012

N.P.D. Angerilli  and
D.M. Logan
N.P.D. Angerilli
Affiliation:
Agriculture Canada Research Station, Summerland, British Columbia, Canada V0H 1Z0
D.M. Logan
Affiliation:
Agriculture Canada Research Station, Summerland, British Columbia, Canada V0H 1Z0
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Abstract

Comparisons of three isomers of the San Jose scale [Quadraspidiotus perniciosus (Comstock)] pheromone showed that SJS3 was slightly more attractive than SJS1 or SJS2. Pheromone-baited traps were compared with sticky barrier traps for the detection and monitoring of male emergence activity and each trap type produced a different activity pattern relative to both calendar days and accumulated degree-days (DD). San Jose scale phenology varied between geographic areas of the Okanagan Valley when compared by using DD accumulations above either 7.2 or 10.5°C and suggests a trend towards decreasing DD requirements as the insect’s distribution moves north.

Résumé

La comparaison de trois isomères de la phéromone de la cochenille de San José, Quadraspidiotus perniciosus (Comstock) a révélé que le SJS3 est légèrement plus attractif que les SJS1 et SJS2. On a comparé des pièges appâtés à la phéromone à des barrières engluées pour détecter et suivre l’émergence des mâles; chaque type de piège révèle un patron d’activité particulier, à la fois selon le calendrier et selon l’accumulation thermique (degrés-jours). La phénologie de la cochenille de San José, telle que révélée par l’accumulation des degrés-jours au-dessus de 7,2 ou 10°C, a varié entre différentes régions de la vallée de l’Okanagan, indiquant une tendance à la décroissance des besoins thermiques de l’insecte vers le nord de sa distribution.

Type
Articles
Information
The Canadian Entomologist , Volume 118 , Issue 8 , August 1986 , pp. 767 - 774
Copyright
Copyright © Entomological Society of Canada 1986

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