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EVALUATION OF PHEROMONE-BAITED TRAPS AND PHEROMONE LURE CONCENTRATIONS FOR MONITORING BLUEBERRY LEAFTIER (LEPIDOPTERA: TORTRICIDAE) POPULATIONS

Published online by Cambridge University Press:  31 May 2012

Sridhar Polavarapu  and
William D. Seabrook
Sridhar Polavarapu
Affiliation:
Department of Biology, University of New Brunswick, Fredericton, New Brunswick, Canada E3B 6E1
William D. Seabrook
Affiliation:
Department of Biology, University of New Brunswick, Fredericton, New Brunswick, Canada E3B 6E1
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Abstract

Six pheromone trap designs, including five high-capacily and a sticky trap, and four PVC lure concentrations of pheromone were evaluated for monitoring blueberry leaftier populations in six blueberry fields in Nova Scotia. Larval densities and subsequent male moth catches in the same year for all the trap designs evaluated, except double funnel traps, were highly correlated. Multipher III traps captured the highest number of moths, followed by Unitraps and double funnel traps. The ice cream container trap captured significantly fewer moths than any other trap design. At most locations, the first moth was caught on the same day in all the trap designs except the ice cream container trap. Trap catches increased with increasing pheromone concentration up to 0.03% dose. Traps baited with 0.3% lures captured significantly fewer moths than those with 0.003% or 0.03%. Based on mean trap catches, R2 values, coefficients of variation among traps, trap efficiency, and lure evaluations, the Unitraps baited with 0.003% lures are selected for further development of a population monitoring system for blueberry leaftier moths. The Multipher III traps baited with 0.03% lures captured up to 44 000 male moths (mean per trap per season) at high densities, demonstrating their potential in mass trapping blueberry leaftiers.

Résumé

Six types de pièges à phéromones, cinq de grande taille et un piège collant, et quatre concentrations (PVC) de phéromones ont été évalués comme outils d’estimation de populations de lieuses dans six champs de bleuets de Nouvel le-Écosse. La densité des larves et le nombre de mâles adultes capturés la même année étaient en très forte corrélation dans tous les types de pièges, sauf dans les pièges à entonnoir double. Ce sont les pièges Multipher III qui capturaient le plus grand nombre de papillons, puis les pièges Unitrap et enfin les pièges à entonnoir double. Le piège constitué d’un contenant de crème glacée capturait significativement moins de papillons que tout autre type de piège. À la plupart des endroits, les premiers papillons étaient capturés la même journée dans tous les pièges, sauf dans le piège «comenanl de crème glacée.» Le nombre de papillons capturés augmentait en fonction de la concentration de pheromone jusqu’à concurrence de 0,03%. Les pièges garnis de leurres 0,3% capturaient significativement moins de papillons que ceux garnis de concentrations de 0,003% ou de 0,03% de phéromone. D’après les nombres moyens de papillons capturés, les valeurs de R2. les coefficients de variations dans les pièges, l’efficacité des pièges et des concentrations de phéromone, ce sont les pièges Unitrap garnis de leurres 0,003% de phéromone qui conviennent le mieux lors de l’estimation des populations de Lieuses des bleuets. Les pièges Multipher III garnis de leurres 0,03% ont capturé jusqu’à 44 000 mâles (nombre moyen par piège par saison) dans des conditions de haute densité, ce qui en fait un piège bien adapté à la capture de nombres importants de Lieuses des bleuets.

[Traduit par la rédaction]

Type
Articles
Information
The Canadian Entomologist , Volume 124 , Issue 5 , October 1992 , pp. 815 - 825
Copyright
Copyright © Entomological Society of Canada 1992

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