The transmission of 2 strains of raspberry ringspot virus, one from Scotland (RRV-S) and one from England (RRV-E), was tested using 2 species of Longidorus. RRV-S was only rarely transmitted by L. macrosoma but readily by L. elongatus. RRV-E was seldom transmitted by either species. The low frequency of transmission may be due to retention of the virus particles in the feeding apparatus or to lack of infectivity of the virus when L. macrosoma is the vector and Petunia hybrida is the host.