Severity of symptoms of decline in 2 species of oaks incurred by 6 species of pathogens.
| Ave. severity | |||||||
|---|---|---|---|---|---|---|---|
| Days after inoculation | |||||||
| Pathogen | Quercus sp. | 148 | 155 | 162 | 165 | 176 | 183 |
| Verticillium | agrifolia | 1.0 | 1.0 | 2.0 | 3.3 | 4.3 | 7.0 |
| lobata | 1.0 | 1.0 | 1.7 | 1.7 | 3.3 | 5.7 | |
| Pestalotia | agrifolia | 1.0 | 1.0 | 1.0 | 1.3 | 2.3 | 5.3 |
| lobata | 1.0 | 1.0 | 1.7 | 1.3 | 2.0 | 5.7 | |
| Dothiorella | agrifolia | 1.0 | 1.0 | 3.3 | 4.7 | 5.7 | 7.0 |
| lobata | 1.0 | 1.0 | 4.0 | 5.0 | 5.0 | 6.7 | |
| Cephalosporium | agrifolia | 1.0 | 1.0 | 1.7 | 3.0 | 4.0 | 4.7 |
| lobata | 1.0 | 1.0 | 2.0 | 3.3 | 5.0 | 8.3 | |
| Phialophora | agrifolia | 1.0 | 1.0 | 1.3 | 2.0 | 3.0 | 3.3 |
| lobata | 1.0 | 1.0 | 2.0 | 2.3 | 5.0 | 8.7 | |
| Fusarium | agrifolia | 1.0 | 1.0 | 1.3 | 2.0 | 2.0 | 3.0 |
| lobata | 1.0 | 1.0 | 1.3 | 2.7 | 4.0 | 9.0 | |
| Controls | agrifolia | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 |
| lobata | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | |
| Mean air temperature (°C) | 9.5 | 10.2 | 15.5 | 16.3 | 17.0 | 15.3 | |
| Mean soil moisture (%) | 59.5 | 62.5 | 38.0 | 45.5 | 49.0 | 44.0 | |
L.S.D. 5% level by Student’s t test = 3.96