Acknowledgements
We thank Robert Dinwiddie and Lina Norrlund at the Plant Protection Centers of the Swedish Board of Agriculture for their help and for sharing their data on Bruchus rufimanus surveys across Sweden. For technical assistance in the field and laboratory, we thank John Löfkvist, Ida Elisabeth Mackegård and Robyn Övergaard. We are grateful to Åsa Lankinen for reviewing the manuscript. Funding was provided by FORMAS, grant 2016-00626.