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Identification of Host Fruit Volatiles from Hawthorn ( Crataegus spp.) Attractive to Hawthorn-Origin Rhagoletis pomonella Flies

Nojima, Satoshi ; Linn Jr., Charles ; Morris, Bruce ; Zhang, Aijun ; Roelofs, Wendell

In: Journal of Chemical Ecology, 2003, vol. 29, no. 2, p. 321-336

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    Titre
    • Identification of Host Fruit Volatiles from Hawthorn ( Crataegus spp.) Attractive to Hawthorn-Origin Rhagoletis pomonella Flies
    Auteur
    • Nojima, Satoshi. Department of Entomology, NYS Agricultural Experiment Station, Cornell University, Geneva, 14456, New York
    • Linn Jr., Charles. Department of Entomology, NYS Agricultural Experiment Station, Cornell University, Geneva, 14456, New York
    • Morris, Bruce. Department of Entomology, NYS Agricultural Experiment Station, Cornell University, 14456, Geneva, New York
    • Zhang, Aijun. USDA-ARS-PSI, Insect Chemical Ecology Lab., 20705, Beltsville, Maryland
    • Roelofs, Wendell. Department of Entomology, NYS Agricultural Experiment Station, Cornell University, 14456, Geneva, New York
    Type de document
    • Postprint
    Langue
    • Anglais
    Publié dans
    • Journal of Chemical Ecology, 2003, vol. 29, no. 2, p. 321-336. Kluwer Academic Publishers-Plenum Publishers
    Autre version électronique
    Identifiant OAI-PMH
    • oai:doc.rero.ch:320957
    Summary
    Solid-phase microextraction (SPME) and gas chromatography coupled with electroantennographic detection (GC-EAD) were used to identify volatile compounds from hawthorn fruit (Crataegus spp.) acting as behavioral attractants for hawthorn-infesting Rhagoletis pomonella flies. Consistent EAD activity was obtained for six chemicals: ethyl acetate (94.3%), 3-methylbutan- 1-ol (4.0%), isoamyl acetate (1.5%), 4,8-dimethyl-1,3(E),7-nonatriene (0.07%), butyl hexanoate (0.01%), and dihydro-β-ionone (0.10%). In a flight-tunnel bioassay, there was a dose-related increase in the percentage of flies flying upwind to the six-component mixture. Hawthorn-origin flies also made equivalent levels of upwind flight with the synthetic blend and an adsorbent extract of volatiles collected from whole fruit, each containing the same amount of the 3-methylbutan-1-ol compound. Significantly lower levels of upwind flight occurred to a previously identified volatile blend of ester compounds that attracts R. pomonella flies infesting domestic apples, compared with the hawthorn volatile mix. Selected subtraction assays showed further that the four-component mixture of 3-methylbutan-1-ol, 4,8-dimethyl-1,3(E),7-nonatriene, butyl hexanoate, and dihydro-β-ionone also elicited levels of upwind flight equivalent to the six-component mix. Removal of 3-methylbutan-1-ol from the four-component blend resulted in complete loss of upwind flight behavior. Removal of dihydro- β-ionone, 4,8-dimethyl-1,3(E),7-nonatriene, or butyl hexanoate from the four-component mixture resulted in significant decreases in the mean number of upwind flights compared to the four- or six-component mixtures