Influence of Cultivar and Biocontrol Treatments on the Effect of Olive Stem Extracts on the Viability of Conidia.

The effect of olive () stem extract (OSE) on the viability of conidia of , the causal agent of Verticillium wilt of olive (VWO), is not yet well understood. Thus, the aim of this study was to determine the influence of the olive genotype (cultivar resistance) and the interaction between olive cultivars and biocontrol treatments on the effect of OSE on conidial germination of by sensitivity tests. To this end, OSE from cultivars Frantoio, Arbequina, and Picual, respectively tolerant, moderately susceptible, and highly susceptible to , were tested alone or after treatments with biological control agents (BCAs) and commercial products efficient at reducing the progress of VWO.