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Investigating dispersal abilities of Aphrophoridae in European temperate regions to assess the threat of potential Xylella fastidiosa-based pathosystems

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Abstract

Modeling the potential spread of Xylella fastidiosa can document contingency plans in northern Europe, so far uncolonized by the bacterium. Through mark–release–recapture (MRR) and flight-mill experiments, the flight capacity of two potential vectors for temperate Europe was studied: Philaenus spumarius, the reported southern European vector, and Aphrophora salicina, a xylem-specialist feeding on potential host plants of X. fastidiosa. Aphrophora salicina displayed significantly better flight performances than P. spumarius. In flight-mills, the average distance flown was, respectively, 623 m vs. 102 m and the maximal distance flown was 6.16 km vs. 1.54 km in 2.5 h. In MRRs, A. salicina travelled more than 30 m in a single flight, with a maximal interception distance of 80 m after two days, highlighting that dispersal is driven by connectivity and host plant quality. Philaenus spumarius mainly jumped, with 1 m movements in length and a maximal interception distance of 32 m in 27 days. Models estimated P. spumarius' daily mean dispersal at 1.5 m and A. salicina's at 3.5 m. Although only a small part of the population moves over very long distances, this pool of efficient insects could already be sufficient to effectively spread an epidemic. As Salicaceae have been reported as host plants of the bacterium, the association of Aphrophoridae and Salicaceae in riparian areas could create bacterium reservoirs in corridors allowing for transportation over medium to long distances.

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Additional data will be provided by the authors upon reasonable request.

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Acknowledgements

We would like to acknowledge all those who made the mark–release–recapture experiments possible: the Bruxelles Environnement/Leefmilieu Brussel administration, the DNF Cantonnement of Nivelles and its head, Ivan Thienpont and Marc Georges, the administrator and coordinator of the “Gestions et Visites” working group of the ASBL Environnement Dyle as well as all the volunteers. We are particularly grateful to Marc Georges for the valuable support provided in the natural reserve of Genappe. We also would like to thank Benoit Denègre (ULB Faculty Electronicist) for the improvement in the design of the flight-mills, Luc Dekelver (ULB Greenhouse Technician) for the maintenance of the plants in the greenhouse and Amandine Géradin and Lena Pesenti for their help in the field.

Funding

The research that yielded these results was funded by the Belgian Federal Public Service of Health, Food Chain Safety and Environment through the contract RF 19/6331 (XFAST project). SH was supported by the Belgian Federal Public Service of Health, Food Chain Safety and Environment and NC by the Foundation for Training in Industrial and Agricultural Research (FRIA, FNRS).

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JCG, SH, CB, NC conceived and designed the research. SH, NC, GC, AG conducted dispersal experiments. GC adapted the dispersal model gathering flight-mill and mark–release–recapture data. SH and GC carried out the abundance experiments of A. salicina. SH produced the dispersion maps. NC and SH wrote the manuscript. All coauthors commented on previous versions of the manuscript and read and approved the final manuscript.

Corresponding authors

Correspondence to Claude Bragard or Jean-Claude Grégoire.

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The authors have no relevant financial or non-financial interests to disclose.

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No approval of research ethics committees was required to accomplish the goals of this study because experimental work was conducted with unregulated invertebrate species.

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Communicated by Nicolas Desneux.

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Casarin, N., Hasbroucq, S., Carestia, G. et al. Investigating dispersal abilities of Aphrophoridae in European temperate regions to assess the threat of potential Xylella fastidiosa-based pathosystems. J Pest Sci 96, 471–488 (2023). https://doi.org/10.1007/s10340-022-01562-9

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  • DOI: https://doi.org/10.1007/s10340-022-01562-9

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