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Spatial distribution of Vespa velutina-mediated beekeeping risk in France and Germany

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Abstract

The Yellow-legged hornet (Vespa velutina nigrithorax) was accidentally introduced into south-western of France in 2004 and rapidly spread throughout France and neighbouring countries. This insect predator hunts honey bees leading to a hornet-mediated beekeeping risk (HBR) with potential mortality of honey bee colonies and important economic costs. However, the spatial distribution of HBR is not yet assessed and is urgently required to formulate suitable management plans in Western Europe. We conducted a two-year citizen science survey in France and Germany to assess the spatial distribution of (1) the hornet and (2) HBR, and to (3) determine the environmental factors involved. A total of 1678 beekeepers participated in the survey. As expected, the hornet was established throughout the French territory, and was mainly detected near the French border in Germany. We found that HBR was substantially lower in Germany than in France. Temperature had a positive effect on both hornet presence and HBR, whereas distance to the introduction point had a negative effect in both France and Germany. These results suggest that the impact of V. velutina on beekeeping is not homogenous across the invasion range and could be reduced on the eastern front due to the continental climate. Taking into account the spatial variability of HBR could help to formulate regionally adapted management plans to limit the impact of V. velutina on biodiversity, human health and economic sectors.

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Data availability

Data available from the figshare repository https://doi.org/https://doi.org/10.6084/m9.figshare.24182721 (Requier et al. 2023b).

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Acknowledgements

We would like to thank all the beekeepers who took part in this survey. We would also like to thank Margaux Goulard for her help in data cleaning, Léandre Goydadin #UneSaisonAuxAbeilles and Christoph Otten for their help in disseminating the survey.

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This research has not received specific funding from any public, commercial or not-for-profit funding body.

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Correspondence to Fabrice Requier.

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The authors declare that the research was conducted in the absence of any commercial or financial relationship that could be construed as a potential conflict of interest.

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Communicated by Antonio Biondi.

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Requier, F., Nürnberger, F., Rojas-Nossa, S.V. et al. Spatial distribution of Vespa velutina-mediated beekeeping risk in France and Germany. J Pest Sci (2024). https://doi.org/10.1007/s10340-024-01782-1

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  • DOI: https://doi.org/10.1007/s10340-024-01782-1

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