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Captures of oriental fruit moth, Grapholita molesta (Lepidoptera: Tortricidae), in traps baited with host-plant volatiles in Chile

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Abstract

Studies in Australia and China identified host-plant volatile blends from peach and pear that captured relatively high numbers of Grapholita molesta (Busck). To determine if these blends are attractants in other countries and relative to each other, the two host-plant blends, a laboratory blend identified in Switzerland, and a new “total blend” made by mixing components of all three blends, were field-tested in Chile for the first time. The same solvent type, concentrations, and dispensers as in the original studies, plus an additional concentration and solvent, were used. Only the Swiss blend at the low n-hexane concentration captured significantly more males than the solvent traps, albeit in very low numbers (1.46 ± 1.46, mean ± SEM males/trap/week). Furthermore, host-plant blends decreased male captures in sex pheromone traps, and the effect was dose-dependent for the Chinese and total blends. A laboratory flight tunnel test confirmed the lack of G. molesta male response to the Australian, Chinese, and Swiss plant blends. In the flight tunnel, however, the males responded sooner and in higher numbers to mixtures of sex pheromone with host-plant blends than they did to the sex pheromone alone.

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Acknowledgements

B.A. acknowledges support by a Ph.D. fellowship from MICINN (Spain). W.B.P acknowledges a FONDECYT-Postdoctorado Grant 3140285 (Chile). The visit of C.G. to Chile was funded by Chilean Government grant CONICYT-Atracción de Capital Humano Avanzado del Extranjero-Modalidad Estadías Cortas (MEC) 80120005. Field work in Chile was supported by Alexis Muñoz, Nicolás Berríos, and Carlos Cavieres.

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Correspondence to César Gemeno.

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Wilson Barros-Parada and Byrappa Ammagarahalli share equal credit.

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Barros-Parada, W., Ammagarahalli, B., Basoalto, E. et al. Captures of oriental fruit moth, Grapholita molesta (Lepidoptera: Tortricidae), in traps baited with host-plant volatiles in Chile. Appl Entomol Zool 53, 193–204 (2018). https://doi.org/10.1007/s13355-017-0543-7

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  • DOI: https://doi.org/10.1007/s13355-017-0543-7

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