Subject
- Agricultural pests -- Control -- Congresses52
- Agricultural experiment stations -- Research -- Oregon -- Jackson County32
- Agriculture -- Oregon -- Jackson County -- Field experiments32
- Entomology32
- Pears -- Diseases and pests20
- 4-H clubs10
- Pear psylla -- Control5
- Two-spotted spider mite -- Control5
- Apples -- Diseases and pests3
- Barred owl -- Reproduction3
- Codling moth -- Control3
- Northern spotted owl -- Reproduction3
- Codling moth2
- Fisheries -- Economic aspects -- Congresses2
- Pear -- Diseases and pests -- Oregon2
- Western Dry Kiln Clubs. Meeting2
- Computer simulation1
- Earthquakes -- Oregon -- Portland1
- Earthquakes -- Washington (State) -- Vancouver1
- Forage plants -- Quality1