The appearance of soil-borne viruses in Finnish plant nurseries

Abstract

In studies conducted by the Department of Plant Pathology of the Agricultural Research Centre, soil-borne viruses were found in soil samples from seven nurseries out of thirteen sampled and from fields at two experimental stations in south and south-west Finland. Tobacco necrosis virus was identified for the first time in Finland in 12 isolates and in addition tobacco rattle virus in 8 isolates. All these isolates were made from 193 soil and plant samples collected in late autumn of 1970. For the first time in Finland the nematode Trichodorus pachydermus Seinhorst was identified from extracts of TRV-infected soil and plant samples.