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Identification of walnut husk ( Juglans regia L.) volatiles and the behavioural response of the invasive Walnut Husk Fly, Rhagoletis completa Cresson
Author(s) -
Sarles Landry,
Boullis Antoine,
Fassotte Bérénice,
Lognay Georges,
Verhaeghe Agnès,
Francis Frédéric,
Verheggen François J
Publication year - 2017
Publication title -
pest management science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.296
H-Index - 125
eISSN - 1526-4998
pISSN - 1526-498X
DOI - 10.1002/ps.4584
Subject(s) - juglans , husk , tephritidae , methyl eugenol , rhagoletis , juglandaceae , biology , botany , kairomone , horticulture , pest analysis , host (biology) , ecology
BACKGROUND Several European countries are important walnut ( Juglans regia L.) producers. However, these countries must contend with the recent introduction of the Walnut Husk Fly, Rhagoletis completa Cresson (Diptera, Tephritidae), which is causing severe economic losses, especially in organic production. Because most Tephritid fruit flies use kairomones in their search for host plants, we hypothesise that this highly specialist species orients toward the volatile blend released by walnut husks. RESULTS We collected, identified, and quantified the volatile organic chemicals ( VOCs ) released by walnut husks from the most commonly cultivated variety in France (Franquette). Then, the behavioural response of R. completa toward synthetic odour blends was recorded in dual choice assays conducted in net cages. A total of 26 VOCs were identified, with α ‐pinene, β ‐pinene, trans ‐linalool, eugenol, and tetradecane representing the major constituents. In the dual choice assay, male and female R. completa were strongly attracted to synthetic blend that included most of the identified husk VOCs . CONCLUSION When searching for a host plant, R. completa use host fruit kairomones. The potential of these semiochemicals in monitoring and management of this quarantine pest is discussed. © 2017 Society of Chemical Industry