Growth of Xylella fastidiosa isolates from elm and grape grown in periwinkle wilt broth supplemented with either oxytetracycline (antibiotic) or paclobutrazol (PBZ).z
| Treatment and dose | Mean log CFU/mL−1 | |
|---|---|---|
| Elm | Grape | |
| Oxytetracycline 50 μg/mL−1 | 4.97 a | 4.95 a |
| PBZ 200 μg/mL−1 | 5.00 a | 4.99 a |
| PBZ 20 μg/mL−1 | 7.23 b | 8.31 b |
| PBZ 2 μg/mL−1 | 7.18 b | 8.27 b |
| Periwinkle wilt media | 7.38 b | 8.61 b |
↵zGrowth was measured with a spectrophotometer and converted to colony-forming units (CFUs) using a regression equation (Figure 1).
Values are means of three replicates after 10 days of incubation.
Means in each column with identical letters are not significantly different at the 0.05 level by Tukey test SED = 0.028 (elm), 0.52 (grape).