Subject
- Agricultural pests -- Control -- Congresses9
- Codling moth -- Control2
- Grapevine leafroll virus -- Control -- Oregon2
- Insects as carriers of plant disease -- Oregon2
- Mealybugs -- Control -- Oregon2
- Pears -- Diseases and pests2
- Collection development (Libraries)1
- Forest management -- Environmental aspects -- Northwest, Pacific1
- Forests and forestry -- Northwest, Pacific1
- Grapes -- Diseases and pests -- Control -- Oregon1
- Grapes -- Diseases and pests -- Oregon1
- Habitat (Ecology)1
- Northern spotted owl -- Northwest, Pacific1
- Old growth forests -- Government policy -- Northwest, Pacific1
- Old growth forests -- Northwest, Pacific1
- Wildlife conservation -- Northwest, Pacific1