Subject
- Agricultural pests -- Control -- Congresses17
- Fruit trees -- Diseases and pests -- Control15
- Spraying and dusting in agriculture15
- Nut trees -- Diseases and pests -- Control14
- Fruit juices13
- Fruit -- Diseases and pests11
- Fruit -- Drying10
- Fruit -- Color9
- Flies8
- Frozen fruit8
- Fruit -- Preservation8
- Pear8
- Apple industry -- Oregon -- Hood River Valley -- Cost of operation7
- Canning and preserving7
- Fruit -- Diseases and pests -- Control -- Columbia River Valley7
- Fruit -- Storage7
- Pear industry -- Oregon -- Hood River Valley -- Cost of operation7
- Pesticides -- Application -- Columbia River Valley7
- Spraying and dusting in agriculture -- Columbia River Valley7
- Flies -- Control6