Subject
- Beneficial insects -- Habitat -- Oregon -- Willamette River Valley1
- Berries -- Diseases and pests -- Biological control -- Oregon -- Willamette River Valley1
- Brassica -- Diseases and pests -- Oregon -- Willamette River Valley1
- Cabbage maggot -- Control -- Oregon -- Willamette River Valley1
- Fusarium -- Oregon -- Willamette River Valley1
- Fusarium diseases of plants -- Oregon -- Willamette River Valley1
- Fusarium oxysporum -- Oregon -- Willamette River Valley1
- Ground beetles -- Habitat -- Oregon -- Willamette River Valley1
- Insects as biological pest control agents -- Oregon -- Willamette River Valley1
- Parasitic wasps -- Habitat -- Oregon -- Willamette River Valley1
- Predatory insects -- Habitat -- Oregon -- Willamette River Valley1
- Sweet corn -- Diseases and pests -- Oregon -- Willamette River Valley1
- Vegetables -- Diseases and pests -- Biological control -- Oregon -- Willamette River Valley1
- Western spotted cucumber beetle -- Oregon -- Willamette River Valley1