Subject
- Spraying and dusting in agriculture -- Oregon -- Willamette River Valley8
- Blackberries -- Diseases and pests -- Oregon6
- Blackberries -- Diseases and pests -- Control -- Oregon5
- Cherry -- Diseases and pests -- Control -- Oregon5
- Cherry fruit-fly -- Control -- Oregon5
- Pesticides -- Application -- Oregon -- Willamette River Valley5
- Spraying and dusting in agriculture -- Oregon5
- Beets -- Diseases and pests -- Control -- Oregon4
- Beets -- Diseases and pests -- Nutritional aspects -- Oregon4
- Currants -- Diseases and pests4
- Hazelnuts -- Diseases and pests -- Control -- Oregon4
- Strawberries -- Diseases and pests -- Oregon4
- Vegetables -- Diseases and pests -- Control -- Oregon4
- Agriculture -- Oregon3
- Apples -- Diseases and pests -- Control -- Columbia River Valley3
- Apples -- Diseases and pests -- Control -- Oregon -- Willamette River Valley3
- Cherry -- Diseases and pests -- Control3
- Cherry -- Diseases and pests -- Control -- Columbia River Valley3
- Cherry fruit-fly3
- Cydia -- Control -- Oregon3