Table fid-10. Relative susceptibility of conifers in Oregon and Washington to damage by five common root diseases (after Hadfield et al. 1986 and slightly modified after Thies and Sturrock 1995). Susceptibility codes are: 1=severely damaged1, 2=moderately damaged, 3=seldom damaged, 4=not damaged.
Hosts |
Laminated root rot |
Armillaria root disease |
Annosus root disease |
Black stain root disease |
Port-Orford-cedar root disease |
|---|---|---|---|---|---|
| West Side Douglas-fir | 1 | 21 | 3 | 1 | 4 |
| East Side Douglas-fir | 1 | 1 | 3 | 3 | 4 |
| Ponderosa pine | 4 | 2 | 2 | 3 | 4 |
| Lodgepole pine | 3 | 2 | 2 | 3 | 4 |
| Western white pine | 3 | 2 | 3 | 4 | 4 |
| Sugar pine | 3 | 2 | 3 | 4 | 4 |
| Grand fir | 1 | 1 | 1 | 4 | 4 |
| White fir | 1 | 1 | 1 | 4 | 4 |
| Pacific silver fir | 1 | 2 | 1 | 4 | 4 |
| Noble fir | 2 | 2 | 2 | 4 | 4 |
| Subalpine fir | 2 | 2 | 2 | 4 | 4 |
| California red fir | 2 | 2 | 2 | 4 | 4 |
| Western hemlock | 2 | 2 | 22 | 3 | 4 |
| Mountain hemlock | 1 | 2 | 1 | 3 | 4 |
| Larch | 2 | 3 | 3 | 4 | 4 |
| Engelmann spruce | 2 | 2 | 3 | 4 | 4 |
| Sitka spruce | 2 | 2 | 3 | 4 | 4 |
| Western redcedar | 4 | 2 | 3 | 4 | 4 |
| Incense cedar | 4 | 3 | 3 | 4 | 4 |
| Port-Orford-cedar | 4 | 3 | 3 | 4 | 1 |
1 West Side Douglas-fir is moderately damaged up to age 25, susceptibility then decreases.
2 Western hemlock is not severely damaged until it exceeds 150 years.