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Ability of the Oriental Fruit Moth Grapholita molesta (Lepidoptera: Tortricidae) to Detoxify Juglone, the Main Secondary Metabolite of the Non-host Plant Walnut

Piskorski, Rafal ; Ineichen, Simon ; Dorn, Silvia

In: Journal of Chemical Ecology, 2011, vol. 37, no. 10, p. 1110-1116

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    Titre
    • Ability of the Oriental Fruit Moth Grapholita molesta (Lepidoptera: Tortricidae) to Detoxify Juglone, the Main Secondary Metabolite of the Non-host Plant Walnut
    Auteur
    • Piskorski, Rafal. Institute of Agricultural Sciences, Applied Entomology, ETH Zurich, Schmelzbergstrasse 9/LFO, 8092, Zurich, Switzerland
    • Ineichen, Simon. Institute of Agricultural Sciences, Applied Entomology, ETH Zurich, Schmelzbergstrasse 9/LFO, 8092, Zurich, Switzerland
    • Dorn, Silvia. Institute of Agricultural Sciences, Applied Entomology, ETH Zurich, Schmelzbergstrasse 9/LFO, 8092, Zurich, Switzerland
    Type de document
    • Postprint
    Langue
    • Anglais
    Publié dans
    • Journal of Chemical Ecology, 2011, vol. 37, no. 10, p. 1110-1116. Springer-Verlag
    Autre version électronique
    Identifiant OAI-PMH
    • oai:doc.rero.ch:312751
    Summary
    Many plant species produce toxic secondary metabolites that limit attacks by herbivorous insects, and may thereby constrain insect expansion to new hosts. Walnut is a host for the codling moth Cydia pomonella, which efficiently detoxifies the main walnut defensive compound juglone (5-hydroxy-1,4-naphthoquinone). The oriental fruit moth Grapholita molesta, which also belongs to the tribe Grapholitini, does not feed on walnut. We tested the performance of G. molesta, a highly invasive species, on artificial diets containing juglone at levels mimicking those found in walnut over the growing season. Juglone-fed G. molesta survived relatively well to adulthood, but larval and adult body weights were reduced, and larval developmental time was prolonged in a dose-dependent fashion. Chemical analysis of frass from larvae that had been fed a juglone-containing diet suggests that G. molesta reduces juglone to non-toxic 1,4,5-trihydroxynaphthalene in its gut. This unexpected tolerance of G. molesta to high levels of juglone may facilitate expansion of the host range beyond the current rosacean fruit trees used by this invasive pest