Emerging virus and viroid pathogen species identified for the first time in horticultural plants in Finland in 1997-2010

Authors

• Anne Lemmetty MTT Agrifood Research Finland, Plant Production Research, FI-31600 Jokioinen, Finland
• Jaana Laamanen MTT Agrifood Research Finland, Plant Production Research, Antinniementie 1, FI-41330 Vihtavuori, Finland
• Mirkka Soukainen Finnish Food Safety Authority Evira/ Plant Quarantine Laboratory, Mustialankatu 3, FI-00790 Helsinki, Finland
• Jukka Tegel Finnish Food Safety Authority Evira/ Plant Quarantine Laboratory, Mustialankatu 3, FI-00790 Helsinki, Finland

DOI: https://doi.org/10.2137/145960611795163060

Keywords:

allexi-, ilar-, potex-, poty-, tospo- and tymovirus, viroid, ELISA, PCR, sequencing

Abstract

Expansion and intensification of global trade in horticultural plants has increased the risk of spread of new alien pathogen species in the EU. Alien species of pathogenic viruses and viroids in horticultural plants have been introduced into Finland in infected plant material (plants, seedlings, cuttings, tubers, seeds). By 1997, about 30 virus species of horticultural plants had been detected in Finland. We aimed at compiling emerging new virus and viroid records during 1997-2010. Eight new viruses belonging to tospo-, potex-, poty-, tymo-, ilar- and allexiviruses were detected in horticultural plants: four occurred in greenhouse crops, two in vegetables and two in garden ornamentals outdoors. Five new findings of viroids were made in ornamental and vegetable greenhouse crops during 2008-2009. More rapid and accurate diagnostic methods have contributed to identifying new alien pathogens. Global trade seems to be the main reason for the introduction of the newest virus and viroid pathogens into Finland.;