Subject
- Ponderosa pine -- Diseases and pests2
- Western pine beetle2
- Bark beetles -- Control1
- Bark beetles -- Northwest, Pacific1
- 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
- Insect pests -- Pacific States1
- 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
- Ponderosa pine -- Diseases and pests -- Northwest, Pacific1
- Ponderosa pine -- Diseases and pests -- Pacific States1
- Western pine beetle -- Control -- Northwest, Pacific1