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Host-plant finding by the asparagus fly, Plioreocepta poeciloptera (Diptera: Tephritidae), a monophagous, monovoltine tephritid

Published online by Cambridge University Press:  09 March 2007

É Thibout
Affiliation:
IRBI, UMR CNRS 6035, Université F. Rabelais, Faculté des Sciences, Parc Grandmont, 37200 Tours, France
D. Pierre
Affiliation:
IRBI, UMR CNRS 6035, Université F. Rabelais, Faculté des Sciences, Parc Grandmont, 37200 Tours, France
N. Mondy
Affiliation:
IRBI, UMR CNRS 6035, Université F. Rabelais, Faculté des Sciences, Parc Grandmont, 37200 Tours, France
C. Lecomte
Affiliation:
IRBI, UMR CNRS 6035, Université F. Rabelais, Faculté des Sciences, Parc Grandmont, 37200 Tours, France
J.C. Biémont
Affiliation:
IRBI, UMR CNRS 6035, Université F. Rabelais, Faculté des Sciences, Parc Grandmont, 37200 Tours, France
J. Auger*
Affiliation:
IRBI, UMR CNRS 6035, Université F. Rabelais, Faculté des Sciences, Parc Grandmont, 37200 Tours, France
*
*Fax: 33 2 47 36 69 66 E-mail: jacques.auger@univ-tours.fr

Abstract

The role of various olfactory and visual stimuli was studied in host-plant finding by the asparagus fly Plioreocepta poeciloptera (Schrank), a monophagous monovoltine tephritid causing serious damage to asparagus spears. Volatiles released by asparagus plants were extracted by diethyl ether after cryotrapping concentration, and identified by gas chromatography–mass spectrometry. Twelve of the 13 compounds identified were tested using electroantennography to measure the response of the fly. Behavioural response was analysed using two different flight tunnels according to circadian rhythm, age and sex of adults, presence of the plant and of different coloured lures, presence of a male congener, or exposure to four pure asparagus odour compounds that elicited responses in electroantennography, i.e. hexanal, (E)-2-hexenal, (Z)-2-hexen-1-ol and decanal. Data showed that males locate the host plant more quickly than females. Females are attracted mainly by the blend of plant odour and male pheromone. Both sexes respond to a complex of stimuli only during the afternoon. These findings will be helpful in developing new and effective approaches to control this pest insect.

Information

Type
Research Article
Copyright
Copyright © Cambridge University Press 2005

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