Analysis of the expression patterns of virulence-related genes in Ralstonia pseudosolanacearum treated with three active substances. This figure presents the effect of erucamide, oleamide, and camphor bromide (1.5 mg·mL−1) on the expression levels of hrp gene cluster that are crucial for virulence: phcA (A), ace (B), egl3 (C), and pehB (D) in Rp. The ethanol solvent control (CK) was employed as a reference. Post hoc comparisons based on Duncan’s multiple range test after one-way analysis of variance showing means for treatment groups differing significantly (p < 0.05); same letters indicate no significant difference.