Subject
- Spraying and dusting in agriculture -- Oregon -- Willamette River Valley44
- Pesticides -- Application -- Oregon -- Willamette River Valley41
- Spraying and dusting in agriculture -- Oregon19
- Spraying and dusting in agriculture13
- Fungicides -- Oregon10
- Grapes -- Diseases and pests -- Control -- Oregon10
- Pesticides -- Application -- Oregon10
- Viticulture -- Oregon10
- Apples -- Diseases and pests -- Control -- Oregon -- Willamette River Valley8
- Pear -- Diseases and pests -- Control -- Oregon -- Willamette River Valley8
- Spraying and dusting residues in agriculture8
- Blueberries -- Diseases and pests -- Control -- Oregon -- Willamette River Valley7
- Fruit -- Diseases and pests -- Control -- Columbia River Valley7
- Pesticides -- Application -- Columbia River Valley7
- Spraying and dusting in agriculture -- Columbia River Valley7
- Cherry -- Diseases and pests -- Control -- Oregon -- Willamette River Valley6
- Eastern filbert blight -- Control -- Oregon -- Willamette River Valley6
- Hazelnuts -- Diseases and pests -- Control -- Oregon -- Willamette River Valley6
- Walnut -- Diseases and pests -- Control -- Oregon -- Willamette River Valley6
- Apples -- Diseases and pests -- Control -- Columbia River Valley5