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Response of summerform pear psylla (Hemiptera: Psyllidae) to male- and female-produced odors

Published online by Cambridge University Press:  03 January 2012

Christelle Guédot ,
David R. Horton  and
Peter J. Landolt
Christelle Guédot*
Affiliation:
United States Department of Agriculture, Agricultural Research Service, 5230 Konnowac Pass Road, Wapato, Washington 98951, United States of America
David R. Horton
Affiliation:
United States Department of Agriculture, Agricultural Research Service, 5230 Konnowac Pass Road, Wapato, Washington 98951, United States of America
Peter J. Landolt
Affiliation:
United States Department of Agriculture, Agricultural Research Service, 5230 Konnowac Pass Road, Wapato, Washington 98951, United States of America
*
1Corresponding author (e-mail: [email protected]).
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Abstract

We examined the role of chemical signals in sex attraction of pear psylla, Cacopsylla pyricola (Förster), assessing the response of summerform male and female psyllids to male- and female-produced volatile chemicals. Male psyllids were attracted to odors from live females and pentane extracts of females. Extracts of females were as attractive to males as live females, suggesting that the female-produced volatile chemicals responsible for male attraction might be isolated by extracting females with pentane. Females were not attracted to odorants from live females and tended to avoid odorants from extracts of females. Furthermore, summerform males and females were not attracted or repelled by male-produced odorants from live males or extracts of males. Results of olfactometer assays using male summerform C. pyricola are consistent with results from earlier studies with the winterform morphotype of this species.

Résumé

Nous avons étudié le rôle des signaux chimiques impliqués dans l'attraction sexuelle chez le psylle du poirier, Cacopsylla pyricola (Förster) (Hemiptères : Psyllidae). La réponse des mâles et femelles de la forme d'été aux substances volatiles chimiques produites par les mâles et femelles a été évaluée. Les psylles mâles sont attirés par les odeurs de femelles vivantes et d'extraits de femelles avec du pentane. Les extraits de femelles attirent les mâles tout autant que les femelles vivantes, ce qui suggère que les substances volatiles chimiques produites par les femelles et qui attirent les males peuvent être isolées lors de l'extraction des femelles avec du pentane. Les femelles ne sont pas attirées par les odeurs de femelles vivantes et ont tendance à éviter les substances odorantes provenant des extraits de femelles. De plus, les mâles et femelles de la forme d'été ne sont ni attirés ni repoussés par les substances odorantes produites par les mâles vivants ou les extraits de mâles. Les résultats des expériences sur les mâles C. pyricola de la forme d'été avec un olfactomètre sont en accord avec les résultats d'études antérieures obtenus avec la forme hivernante de cette espèce.

Type
Behavior & Ecology
Information
The Canadian Entomologist , Volume 143 , Issue 3 , June 2011 , pp. 245 - 253
Copyright
Copyright © Entomological Society of Canada 2011

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