In particular, MPR3 showed significantly the lowest DI among all representative yeasts. All BCA strains reduced significantly (x2 = 99.17; dF = 4; p < 0.01) DS value on grape berries if compared to control. Once again, the lowest DS value was recorded for the MPR3 application, followed by BS91 and PI1 yeasts (Figs. 2 and 3). Although at different levels, all tested yeasts significantly decreased the size of decay (LD) caused by B. cinerea if compared untreated grape berries (Fig. 2).