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Relative abundance of Liberibacter spp. (i.e., the HLB pathogen) in citrus leaf samples by location and cultivar (A), by sampling date for Valencia trees at the Gainesville site (B), and by severity of HLB symptoms (C). See Fig. S2 for a description of symptom severity categories. Letters a, b, and c indicate significant difference based on Tukey's post hoc test following ANOVA (α set at 0.05).
