Table 4.
Antimicrobial activity of the three plant extracts on selected pathogenic bacteria.
| Size of inhibition zone (cm) |
||||
|---|---|---|---|---|
| |
Different concentrations of Calluna vulgaris extract |
|||
| Bacterial pathogens | 0.23 g/mL | 0.15 g/mL | 0.08 g/mL | 0.04 g/mL |
| Ag. tumefaciens | 4 | 3.5 | 3 | – |
| Erwinia sp. | 2.5 | 2.5 | 2.3 | 1.8 |
| Klebsiella sp. | 3 | 3 | 1.3 | 1.1 |
| Escherichia coli | – | – | – | – |
| Proteus sp. | – | – | – | |
| Pseudomonas aeruginosa | 2.8 | 3 | 2.5 | 1.2 |
| Different concentrations of Tribulus terrestris extract |
||||
| |
0.34 g/mL |
0.23 g/mL |
0.14 g/mL |
0.06 g/mL |
| Ag. tumefaciens | 1.3 | 1 | – | – |
| Erwinia sp. | – | – | – | – |
| Klebsiella sp. | 1.9 | 1.8 | 1.7 | 1.2 |
| Escherichia coli | – | – | – | – |
| Proteus sp. | – | – | – | – |
| Pseudomonas aeruginosa | – | – | – | – |
| Different concentrations of Ferula hermonis extract |
||||
| |
0.23g/mL |
0.15 g/mL |
0.08 g/mL |
0.04 g/mL |
| Ag. tumefaciens | 3.5 | 3.5 | – | – |
| Erwinia sp. | – | – | – | – |
| Klebsiella sp. | – | – | – | – |
| Escherichia coli | – | – | – | – |
| Proteus sp. | – | – | – | – |
| Pseudomonas aeruginosa | – | – | – | – |