Ralstonia solanacearum identified on Rosa sp. in the Netherlands
During an annual survey in 2018 in the Netherlands, the causal agent of potato brown rot, Ralstonia solanacearum (EPPO A2 List) was reported for the first time on asymptomatic roses (Rosa sp.) collected from three greenhouses across the Netherlands. Until now, rose was only reported to be a natural host of Ralstonia pseudosolanacearum (EPPO A2 List). In experiments, the isolates from roses caused severe symptoms on potato plants. The authors suggest that roses could act as a reservoir for R. solanacearum, which is known to spread through surface water.
Sources
Blom NI, Gorkink-Smits PP, Landman NM, van de Bilt JL, Vogelaar MA, Raaymakers TM, Visser M, Pel MJ, Bergsma-Vlami M (2024) Ralstonia solanacearum (phylotype II) isolated from Rosa spp. in the Netherlands is closely related to phylotype II isolates from other sources in the Netherlands and is virulent on potato. European Journal of Plant Pathology 171, 445-458. https://doi.org/10.1007/s10658-024-02960-8