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Role of fruit characters and colour on host selection of boreal fruits and berries by Drosophila suzukii (Diptera: Drosophilidae)

Published online by Cambridge University Press:  27 February 2020

Catherine M. Little Open the ORCID record for Catherine M. Little [Opens in a new window] ,
Peggy L. Dixon ,
Tom W. Chapman  and
N. Kirk Hillier
Catherine M. Little*
Affiliation:
Department of Biology, Acadia University, 33 Westwood Avenue, Wolfville, Nova Scotia, B4P 2R6, Canada Department of Biology, Memorial University of Newfoundland and Labrador, 230 Elizabeth Avenue, Newfoundland and Labrador, St. John’s, A1C 5S7, Canada
Peggy L. Dixon
Affiliation:
St. John’s Research and Development Centre, Agriculture and Agri-Food Canada, 308 Brookfield Road, Newfoundland and Labrador, St. John’s, A1E 0B2, Canada
Tom W. Chapman
Affiliation:
Department of Biology, Memorial University of Newfoundland and Labrador, 230 Elizabeth Avenue, Newfoundland and Labrador, St. John’s, A1C 5S7, Canada
N. Kirk Hillier
Affiliation:
Department of Biology, Acadia University, 33 Westwood Avenue, Wolfville, Nova Scotia, B4P 2R6, Canada
*
*Corresponding author. Email: clittle@mun.ca
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Abstract

Continued range expansion of Drosophila suzukii (Matsumura) (Diptera: Drosophilidae) is exposing new species of soft fruits and berries to potential infestation. Our understanding of cues that drive host-finding and selection in this highly polyphagous pest insect is still incomplete. Fruit firmness influences host choice behaviour by limiting suitability for oviposition and larval development. Other factors such as fruit sweetness and acidity act as cues for fruit ripening. Here we assess the role of these cues and fruit colour on host selection. We demonstrate that the use of objective and nonanthropocentric methods of quantifying colour in studies of colour preference is critical to understanding the cues evoking responses from insects. Acidity but not sweetness increased D. suzukii attraction and larval success. Differences in D. suzukii attraction were most strongly correlated with short-wavelength reflectance (blue, cyan, and green (470–560 nm)). Growers could select for fruit varieties with relatively higher reflectance values upon maturity to reduce susceptibility to D. suzukii.

Type
Research Papers
Information
The Canadian Entomologist , Volume 152 , Issue 4: The spotted-wing drosophila , August 2020 , pp. 546 - 562
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Copyright
© 2020 Entomological Society of Canada

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Footnotes

Subject editor: Roselyne Labbé

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