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Potential for semiochemical-based monitoring of the pea leaf weevil (Coleoptera: Curculionidae) on field pea (Fabaceae) in the Canadian Prairie Provinces

Published online by Cambridge University Press:  15 March 2016

M.L. Evenden*
Affiliation:
Department of Biological Sciences, University of Alberta, Edmonton, Alberta, T6G 2E9, Canada
C.M. Whitehouse
Affiliation:
Forest Health and Adaptation, Forest Management Branch, Alberta Agriculture and Forestry, Edmonton, Alberta, T5K 2M4, Canada
A. St. Onge
Affiliation:
Department of Biological Sciences, University of Alberta, Edmonton, Alberta, T6G 2E9, Canada
L. Vanderark
Affiliation:
Scotts Canada Ltd., Delta, British Columbia, V4G IE9, Canada
J.-P. Lafontaine
Affiliation:
Scotts Canada Ltd., Delta, British Columbia, V4G IE9, Canada
S. Meers
Affiliation:
Pest Surveillance Branch, Alberta Agriculture and Forestry, Brooks, Alberta, T1R 1E6, Canada
H.A. Cárcamo
Affiliation:
Agriculture and Agri-Food Canada, Lethbridge Research Centre, Lethbridge, Alberta, T1J 4B1, Canada
*
1Corresponding author (e-mail: mevenden@ualberta.ca).

Abstract

The pea leaf weevil, Sitona lineatus (Linnaeus) (Coleoptera: Curculionidae), is an important pest of field peas, Pisum sativum Linnaeus (Fabaceae), and faba beans, Vicia faba Linnaeus (Fabaceae), that has recently become established in the Prairie Provinces of Canada. Male pea leaf weevils produce an aggregation pheromone, 4-methyl-3,5-heptanedione, in the spring when overwintered weevils migrate to fields to feed and mate. The current study tests the attractiveness of the aggregation pheromone with and without synthetic bean volatiles to pea leaf weevils in the spring and in the fall when weevils seek perennial legumes to feed and overwinter. Modified Leggett traps similar to those used in Europe did not retain weevils in this study. Aggregation pheromone-baited pitfall traps caught male and female weevils in the spring and fall. Weevils were not attracted to traps baited with three bean volatiles, (Z)-3-hexen-1-yl acetate, (Z)-3-hexen-1-ol, and linalool. Bean volatiles did enhance response to pheromone, but only in the fall. Weevils were captured in most semiochemical-baited traps in a 1:1 sex ratio, but female-biased catch in control traps might indicate greater activity of females in the trap vicinity. This study lays the groundwork for semiochemical-based monitoring to detect pea leaf weevil spread in the Prairie Provinces.

Type
Insect Management
Copyright
© Entomological Society of Canada 2016 

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Footnotes

Subject editor: Jon Sweeney

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