Table 2.
Antibacterial activity of Mentha × piperita cv. ‘Kristinka’ EO.
| Tested EOs | Diameter of Inhibition Zones (mm) | ||||
|---|---|---|---|---|---|
| Conc. | X. campestris | C. michiganensis | P. syr. pv. phaseolicola | P. savastanoi | |
| Peppermint EO | 10 mg/mL | 0.0 ± 0.0 b | 27.5 ± 2.8 b | 39.5 ± 0.5 a | 09.0 ± 1.2 b |
| 1 mg/mL | 0.0 ± 0.0 b | 17.0 ± 2.3 c | 26.5 ± 1.6 b | 0.0 ± 0.0 c | |
| 0.1 mg/mL | 0.0 ± 0.0 b | 09.0 ± 1.1 d | 19.5 ± 0.6 c | 0.0 ± 0.0 c | |
| Tetracycline (1.6 mg/mL) | 23.5 ± 1.70 a | 39.5 ± 0.6 a | 40.0 ± 1.6 a | 37.0 ± 2.2 a | |
Values followed by different letters for each tested bacterium in each column are significantly different at p < 0.05 according to two-way ANOVA combined with Duncan post hoc test. Data are expressed as the mean of three replicates ± SD.