EPPO Global Database

EPPO Reporting Service no. 11 - 2001 Num. article: 2001/189

Surveys on Clavibacter michiganensis subsp. sepedonicus and Ralstonia solanacearum in Germany: 2000 potato harvest

The NPPO of Germany has recently informed the EPPO Secretariat about the results of national surveys on potato bacteria for the 2000 harvest.

Clavibacter michiganensis subsp. sepedonicus (EPPO A2 quarantine pest)
In total, 18,101 potato samples were tested. 12,102 were drawn from seed potato production, 167 from gene banks and propagation material, 571 from trade and 5,261 from ware potatoes. In addition, tubers were cut for visual inspection. Thorough analyses were carried out to trace back the origins of infections and resulted in 22 cases in seed potatoes and 49 cases in ware potatoes. Strict control measures were taken in accordance with Council Directive 93/85 EEC in all cases.

Ralstonia solanacearum (EPPO A2 quarantine pest)
A total of 16,968 potato samples were subjected to laboratory tests for Ralstonia solanacearum. 11,816 samples were taken from seed potato production, and 5,152 from ware potato production. Infection was NOT found. Only one sample from surface water and two samples of Solanum dulcamara were found positive. Investigation will be continued in these cases. Therefore, German potato production is considered to be free from Ralstonia solanacearum.

Surveys for the 2001 harvest for both bacteria have not yet been finalized. They will be of similar extent to those made in 2000.


NPPO of Germany, 2002-01