Radial growth values of (a) N. parvum; (b) D. seriata; and (c) B. dothidea in the presence of the different treatments under study at different concentrations (in µg·mL−1). COS, EPL, MR, ML and C stand for chitosan oligomers, ε-polylysine, S. rochei secondary metabolites, S. lavendofoliae secondary metabolites and control, respectively. For MR and ML only one column is shown, since no inhibition was detected at any concentration in the 250–1500 µg·mL−1 range. Concentrations labelled with the same uppercase letters are not significantly different at p < 0.05 by Tukey’s test. All values are presented as the average of three repetitions. Error bars represent the standard deviation across three replicates.