In trials with potato tubers infected with tobacco rattle virus (TRV), symptoms of spraing in cvs Bellona, King Edward, Maris Bard, Matilda, Sv 82146 and Sv 82149 increased during storage when the tubers were cut. Storage of intact tubers at a constant temperature of 9-degrees-C or at fluctuating temperatures (2 weeks at 18-degrees-C, 2 weeks at 9-degrees-C and 2 weeks at 18-degrees-C) did not increase the frequency of symptoms.