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Differential olfactory responses associated with host plant shift by the fruit-piercing moth, Eudocima phalonia, in the Pacific islands

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Mas, F., Horner, R., Manning, L.-a., Harper, A., Brierley, S., De Faveri, S. G., Leroy, L. and Mille, C. (2023) Differential olfactory responses associated with host plant shift by the fruit-piercing moth, Eudocima phalonia, in the Pacific islands. New Zealand Journal of Crop and Horticultural Science . pp. 1-15. ISSN 0114-0671


Article Link: https://doi.org/10.1080/01140671.2023.2221859


The fruit-piercing moth (FPM) Eudocima phalonia is widely present in the tropics, causing major damages to the citrus industry. In its ancestral distribution range, e.g. Australia, FPM develops on vines from the Menispermaceae family. But in more recently colonized islands, e.g. New Caledonia, FPM populations have shifted to new host plants of the Fabaceae family, Erythrina spp.. To understand this host shift, we studied the chemical ecology of FPM as a mechanism driving host plant acceptance. We collected volatile headspace samples of Erythrina species and Menispermaceae and compared their chemical spectra. We assessed the electrophysiological responses of FPM populations from the two countries to the plant chemical extracts and identified bioactive compounds. The volatile profiles from each species were quite different between and within each plant family. However, five compounds common across the two families triggered electrophysiological responses in both FPM populations. Those common bioactive compounds could have facilitated the host shift to completely different plant family. Furthermore, the diverging history between the two FPM populations may explain differences in electrophysiological sensitivity to other specific compounds. These results are discussed in the context of the production of a generic lure that could be attractive to all FPM populations.

Item Type:Article
Corporate Creators:Department of Agriculture and Fisheries, Queensland
Business groups:Horticulture and Forestry Science
Keywords:Eudocima phalonia Erythrina fruit pest host shift Menispermaceae
Subjects:Science > Entomology
Science > Zoology > Invertebrates > Insects
Plant culture > Fruit and fruit culture
Plant pests and diseases
Agriculture > By region or country > Australia
Live Archive:29 Aug 2023 02:43
Last Modified:29 Aug 2023 02:43

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