Fig. 2

Pierce’s disease symptoms and Xylella fastidiosa titers. A Mean (± SE) Pierce’s disease symptom ratings (on a 0 to 5 scale) and B mean (± SE) Xylella fastidiosa titers for the 2018 and 2019 experiments. Kruskal–Wallis statistical test statistics provided. Different letters represent significantly different pairwise comparisons as determined by Mann–Whitney U tests. C = well-watered controls; D = water deficit treated; N = non-infected controls; X = Xf-infected