Subject
- Spraying and dusting in agriculture -- Oregon -- Willamette River Valley44
- Pesticides -- Application -- Oregon -- Willamette River Valley41
- Douglas fir -- Diseases and pests29
- Vegetable gardening -- Oregon27
- Spraying and dusting in agriculture -- Oregon17
- Grapes -- Diseases and pests -- Control -- Oregon16
- Report (United States. Forest Service. Northern Region. Forest Pest Management)14
- Viticulture -- Oregon13
- Fungicides -- Oregon11
- Pesticides -- Application -- Oregon11
- Douglas fir -- Diseases and pests -- Oregon10
- Pear -- Diseases and pests -- Control -- Oregon -- Willamette River Valley10
- Strawberries -- Diseases and pests -- Oregon10
- Apples -- Diseases and pests -- Control -- Oregon -- Willamette River Valley9
- Blackberries -- Diseases and pests -- Oregon9
- Grapes -- Diseases and pests -- Oregon9
- Trees -- Diseases and pests -- Oregon9
- Beans -- Diseases and pests8
- Blueberries -- Diseases and pests -- Control -- Oregon -- Willamette River Valley8
- Cherry -- Diseases and pests -- Control -- Oregon -- Willamette River Valley8