Mean disease ratings for 4 live oak selections at 7 and 11 weeks following inoculation with Ceratocystis fagacearum (Study I).
| Seven weeks | Eleven weeks | |||
|---|---|---|---|---|
| Selectionsx | No. diseased trees | Ratingy | No. diseased trees | Rating |
| Robinson Ranch | 20 | 2.7a | 20 | 3.0az |
| Q. fusiformis | ||||
| Canyon Live Oak | 15 | 1.6b | 17 | 2.2b |
| Q. chrysolepis | ||||
| TFS 522 | 16 | 1.5b | 19 | 2.1b |
| Q. virginiana | ||||
| TFS 160 | 14 | 1.1b | 16 | 1.9b |
| Q. virginiana | ||||
↵x See text for further explanation of sources of selections; there were 20 trees inoculated for each selection.
↵y The disease rating system consisted of; 3 = dead, 2 = > 0.5 of seedling with wilt symptoms, 1 = < 0.5 of seedling with wilt, and 0 = healthy, no symptoms.
↵z Means with the same letter are not significantly different at alpha = 0.05.