Average mortality rates (%) and their corresponding SE values of grafted grapevine plants observed in the experimental nurseries (2013, 2014, and 2015 growing seasons) after treatment with different endophytic (VV/E1, VV/E2, or VV/E5) or rhizosphere (VV/R1, VV/R4, or VV/R5) strains compared to untreated control plants. Bars marked with the same letter are not significantly different (P ≥ 0.05).