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Response of female Cydia molesta (Lepidoptera: Tortricidae) to plant derived volatiles

Published online by Cambridge University Press:  09 March 2007

D. Natale
Affiliation:
Institute of Plant Sciences, Applied Entomology, Swiss Federal Institute of Technology (ETH), Clausiusstrasse 25/NW, CH-8092 Zurich, Switzerland
L. Mattiacci
Affiliation:
Institute of Plant Sciences, Applied Entomology, Swiss Federal Institute of Technology (ETH), Clausiusstrasse 25/NW, CH-8092 Zurich, Switzerland
A. Hern
Affiliation:
Institute of Plant Sciences, Applied Entomology, Swiss Federal Institute of Technology (ETH), Clausiusstrasse 25/NW, CH-8092 Zurich, Switzerland
E. Pasqualini
Affiliation:
DiSTA, University of Bologna, Via Filippo Re 6, I-40126 Bologna, Italy
S. Dorn*
Affiliation:
Institute of Plant Sciences, Applied Entomology, Swiss Federal Institute of Technology (ETH), Clausiusstrasse 25/NW, CH-8092 Zurich, Switzerland
*
*Fax: +41 1 632 11 71 E-mail: silvia.dorn@ipw.agrl.ethz.ch

Abstract

Peach shoot volatiles were attractive to mated female oriental fruit moth, Cydia molesta (Busck), in a dual choice arena. No preference was observed between leaf odours from the principle host plant, peach, and the secondary host plant, apple. Twenty-two compounds were identified in headspace volatiles of peach shoots using gas chromatography–mass spectrometry. Green leaf volatiles accounted for more than 50% of the total emitted volatiles. A bioassay-assisted fractionation using different sorbent polymers indicated an attractant effect of compounds with a chain length of 6–8 carbon atoms. The major compounds of this fraction were tested either singly or in combinations for behavioural response of females. Significant bioactivity was found for a three-component mixture of (Z)-3-hexen-1-yl acetate, (Z)-3-hexen-1-ol and benzaldehyde in a 4:1:1 ratio. This synthetic mixture elicited a similar attractant effect as the full natural blend from peach shoots as well as the bioactive fraction.

Type
Review Article
Copyright
Copyright © Cambridge University Press 2003

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