Subject
- Douglas fir -- Diseases and pests -- Cultural control2
- Douglas fir -- Pruning2
- Fomes pini -- Cultural control2
- Bark beetles -- Control1
- Blister rust -- Economic aspects -- California1
- Blister rust -- Economic aspects -- Oregon1
- Forest insects -- Oregon1
- Forest insects -- Washington (State)1
- Forest management1
- Forest management -- Northwest, Pacific1
- Grapes -- Diseases and pests -- Oregon1
- Grapevine leafroll virus -- Oregon1
- Grasses -- Diseases and pests -- Oregon1
- Lodgepole pine -- Diseases and pests -- Oregon1
- Lodgepole pine -- Diseases and pests -- Washington (State)1
- Ponderosa pine -- Diseases and pests -- Control1
- Ponderosa pine -- Diseases and pests -- Control -- Northwest, Pacific1
- Rhopalosiphum -- Fertility -- Oregon1
- Rhopalosiphum -- Host plants -- Oregon1
- Rodents -- Control1