Subject
- Spraying and dusting in agriculture -- Oregon -- Willamette River Valley36
- Pesticides -- Application -- Oregon -- Willamette River Valley35
- Grapes -- Diseases and pests -- Control -- Oregon9
- Agricultural pests -- Control -- Willamette River Valley (Or.)8
- Cherry -- Diseases and pests -- Control -- Oregon -- Willamette River Valley8
- Fungicides -- Oregon8
- Peach -- Diseases and pests -- Integrated control -- Oregon8
- Pear -- Diseases and pests -- Control -- Oregon -- Willamette River Valley8
- Pesticides -- Application -- Oregon8
- Spraying and dusting in agriculture -- Oregon8
- Viticulture -- Oregon8
- Apples -- Diseases and pests -- Control -- Oregon -- Willamette River Valley7
- Fruit -- Diseases and pests -- Control -- Columbia River Valley7
- Peach -- Diseases and pests -- Control -- Oregon7
- Pesticides -- Application -- Columbia River Valley7
- Spraying and dusting in agriculture -- Columbia River Valley7
- Walnut -- Diseases and pests -- Control -- Oregon -- Willamette River Valley7
- Cherry -- Diseases and pests -- Integrated control -- Oregon -- Willamette River Valley6
- Eastern filbert blight -- Control -- Oregon -- Willamette River Valley6
- Hazelnuts -- Diseases and pests -- Control -- Oregon -- Willamette River Valley6