Fig. 5

Disease index calculated by evaluating aerial symptoms in control, mild-WS and severe-WS primed ‘Dusa’ plants infected with R. necatrix (a), and mean values (±SE, controls n = 18 and treatments n = 20) of area under disease progress curve (AUDPC) for each treatment (b). Different letters indicate significant differences among groups (P < 0.05; one-way ANOVA followed by LSD)