Subject
- Spraying and dusting in agriculture -- Oregon -- Willamette River Valley[remove]7
- Pesticides -- Application -- Oregon -- Willamette River Valley6
- Apples -- Diseases and pests -- Control -- Oregon -- Willamette River Valley1
- Blueberries -- Diseases and pests -- Control -- Oregon -- Willamette River Valley1
- Cherry -- Diseases and pests -- Control -- Oregon -- Willamette River Valley1
- Eastern filbert blight -- Control -- Oregon -- Willamette River Valley1
- Hazelnuts -- Diseases and pests -- Control -- Oregon -- Willamette River Valley1
- Pear -- Diseases and pests -- Control -- Oregon -- Willamette River Valley1
- Plum -- Diseases and pests -- Control -- Oregon -- Willamette River Valley1
- Walnut -- Diseases and pests -- Control -- Oregon -- Willamette River Valley1