Subject
- Agricultural pests -- Control -- Congresses15
- Cherry -- Diseases and pests12
- Cherry -- Diseases and pests -- Control -- Oregon -- Willamette River Valley8
- Sweet cherry -- Diseases and pests8
- Sweet corn -- Diseases and pests7
- Cherry -- Diseases and pests -- Control -- Oregon6
- Cherry -- Diseases and pests -- Integrated control -- Oregon -- Willamette River Valley6
- Pesticides -- Application -- Oregon -- Willamette River Valley6
- Spraying and dusting in agriculture -- Oregon -- Willamette River Valley6
- Vegetable gardening -- Oregon6
- Apples -- Diseases and pests -- Control -- Columbia River Valley5
- Cherry -- Diseases and pests -- Control -- Columbia River Valley5
- Cherry fruit-fly -- Control -- Oregon5
- Fruit -- Diseases and pests -- Control -- Columbia River Valley5
- Pear -- Diseases and pests -- Control -- Columbia River Valley5
- Pesticides -- Application -- Columbia River Valley5
- Spraying and dusting in agriculture -- Columbia River Valley5
- Cherry -- Diseases and pests -- Oregon4
- Cherry -- Diseases and pests -- Control3
- Cherry fruit-fly3