Subject
- Douglas fir -- Diseases and pests[remove]29
- Report (United States. Forest Service. Northern Region. Forest Pest Management)3
- Bark beetles2
- Douglas fir -- Seedlings2
- Fusarium2
- Fusarium diseases of plants2
- Swiss needle cast -- Physiological effect2
- Wood-decaying fungi2
- Alternaria diseases1
- Armillaria root rot1
- Douglas fir -- Mechanical properties1
- Douglas fir -- Seedlings, Container1
- Douglas fir beetle -- Control1
- Engelmann spruce -- Diseases and pests1
- Engelmann spruce -- Seedlings1
- Ethylene1
- Fomes pini1
- Insect-plant relationships1
- Lichens1
- Phytophthora cinnamomi1