Subject
- Trees -- Diseases and pests -- Oregon6
- Trees -- Diseases and pests -- Control -- Oregon5
- Forest ecology -- Oregon3
- Conifers -- Diseases and pests -- Oregon2
- Forest insects -- Control -- Oregon2
- Forest insects -- Oregon2
- Fungal diseases of plants -- Oregon2
- Conifers -- Diseases and pests -- Coast Ranges1
- Conifers -- Diseases and pests -- Control -- Oregon1
- Forest ecology -- Oregon, Eastern1
- Forest health -- Oregon1
- Forest management -- Oregon, Eastern1
- Forests and forestry -- Oregon, Eastern1
- Fungal diseases of plants -- Coast Ranges1
- Mushrooms, Edible -- Harvesting -- Northwest, Pacific1
- Mushrooms, Edible -- Northwest, Pacific -- Marketing1
- Ponderosa pine -- Diseases and pests1
- Root rots -- Oregon1
- Swiss needle cast -- Oregon -- Pacific Coast1
- Swiss needle cast -- Washington (State) -- Pacific Coast1