| balsam twig aphid |
Mindarus abietinus |
1 |
| balsam woolly adelgid |
Adelges piceae |
1 |
| cooley spruce gall adelgid |
Adelges cooleyi |
1 |
| cutworms, loopers, owlet moths, and underwings |
|
1 |
| Douglas-fir beetle |
Dendroctonus pseudotsugae |
1 |
| Douglas-fir tussock moth |
Orgyia pseudotsugata |
18 |
| European pine shoot moth |
Rhyacionia buoliana |
8 |
| fir engraver |
Scolytus ventralis |
1 |
| fire |
|
1 |
| frost and winter injury (general) |
|
1 |
| mountain pine beetle |
Dendroctonus ponderosae |
2 |
| pesticides |
|
12 |
| pine engraver |
Ips pini |
2 |
| spruce beetle |
Dendroctonus rufipennis |
2 |
| western pine beetle |
Dendroctonus brevicomis |
2 |
| western spruce budworm |
Choristoneura freemani |
19 |
| white pine weevil |
Pissodes strobi |
1 |