Update of the situation of Ralstonia solanacearum in Poland
In Poland, Ralstonia solanacearum (EPPO A2 List) causing brown rot of potato (Solanum tuberosum) is under official control. Annual surveys are conducted, and the pathogen was so far found sporadically on ware potatoes and submitted to eradication measures according to EU regulation. In 2021, 3 ware potato lots tested positive and the fields where they had been grown were declared to be infested (in the municipalities of Piaseczno, Pomiechówek and Sieradz).
In June 2022, the pathogen was detected in a sample of water collected in the Widawa river in the municipality of Długołęka. This is the first detection of R. solanacearum in surface water in the territory of Poland.
The pest status of Ralstonia solanacearum in Poland is officially declared as: Present, at low prevalence, under eradication.
Sources
NPPO of Poland (2021-12, 2022-06).