| Isolates | Varieties | Average severity | Ratings* Group | Standard deviation |
| I3TF | TS32-1 | 8.33 | A | 0.001 |
| SH470P | 8.00 | AB | 0.001 | |
| PC7-79 | 7.50 | BC | 0.577 | |
| I1TK | TS32-1 | 7.16 | C | 0.064 |
| SH470P | 6.53 | D | 0.057 | |
| PC7-79 | 6.06 | DE | 0.042 | |
| I2TG | TS32-1 | 5.61 | EF | 0.100 |
| SH470P | 5.19 | FG | 0.005 | |
| PC7-79 | 4.90 | G | 0.016 | |
| ITE | TS32-1 | 1.00 | H | 0.000 |
| SH470P | 1.00 | H | 0.000 | |
| PC7-79 | 1.00 | H | 0.000 |