“…Symptoms appear under favourable conditions (see section 3.1) as well as after cold storage (Rat, 1993). X. fragariae is widespread in nurseries in many countries and has been responsible for important production losses in Europe (Bosshard & Schwind, 1997; López et al, 1985; Mazzucchi et al, 1973). Analyses of X. fragariae strains isolated at different times in diverse locations around the world indicate some genetic and phenotypic diversity among these strains (Opgenorth et al, 1996; Pooler et al, 1996; Roberts et al, 1996).…”