Surveys on Ralstonia solanacearum and Clavibacter michiganensis subsp. sepedonicus in Estonia
In Estonia, systematic surveys on Ralstonia solanacearum and Clavibacter michiganensis subsp. sepedonicus (both EPPO A2 quarantine pests) were initiated by the Estonian Plant Protection Inspectorate in 2000, and continued in 2001 and 2002 (on potato harvest 2001). All samples were tested at the Plant Health Laboratory of the Estonian Control Centre of Plant Production by immunofluorescence (IF). The results of the survey for the potato harvest 2001 are the following:
- Seed potato production: all seed potato lots (110 ha – 127 samples) were tested and no R. solanacearum and C. michiganensis subsp. sepedonicus was found.
- Ware potato production: 720 ha and 8749 tons of ware potatoes were inspected and sampled. 485 samples from 336 lots at 150 production sites were tested. C. michiganensis subsp. sepedonicus was found in 54 samples from 23 lots at 18 production sites. No R. solanacearum was found.
- Imported potatoes: all consignments of seed potatoes and ware potatoes were tested and no R. solanacearum was found. 4 consignments originating from Ukraine were found infested by C. michiganensis subsp. sepedonicus.
Phytosanitary measures in accordance with EU Directive 93/85/EEC are being applied in order to prevent any further spread of C. michiganensis subsp. sepedonicus and to eradicate it.
The situation of C. michiganensis subsp. sepedonicus in Estonia can be described as follows: Present, found only in ware potatoes at a few production sites, under eradication.
The situation of R. solanacearum in Estonia can be described as follows: Absent, confirmed by survey.
NPPO of Estonia, 2002-05.