Phytophthora ramorum does not occur in Estonia
In Estonia, an official survey for Phytophthora ramorum (EPPO Alert List) was carried out from May to September 2004. It mainly focused on Rhododendron and Viburnum species growing in nurseries and garden centres. It was not conducted in forests, as there are only few wild Viburnum and no wild Rhododendron species in Estonian forests. In addition, all other potential host plants of P. ramorum were more intensively checked during regular inspections. During this survey, 38 inspections were made at 36 premises and 1 arboretum. During each inspection, 1 or several samples were taken and sent for diagnosis, even in the absence of any symptoms of the disease. Out of 48 samples, 35 were taken from Rhododendron, 5 from Viburnum, 3 from Quercus, 2 from Syringa, 1 from Acer and 1 from Fagus. Plants mostly originated from the Netherlands, Germany, Poland or Denmark. Only a few lots had been imported several years ago or were of local origin. Identification of P. ramorum was based on microscope analysis after cultivation on growing medium. P. ramorum was not detected.
The status of Phytophthora ramorum in Estonia is declared as follows: Absent, confirmed by survey.
Sources
NPPO of Estonia, 2004-11.