Subject
- Entomopathogenic fungi -- Oregon, Western2
- Agricultural ecology -- Oregon -- Willamette River Valley1
- Agricultural pollution -- Oregon -- Umatilla River -- Evaluation1
- Anthomyiidae -- Ecology -- Oregon -- Willamette River Valley1
- Bees -- Food -- Oregon -- Corvallis1
- Bees -- Food -- Oregon -- Willamette River Valley1
- Bees -- Habitat -- Oregon -- Willamette River Valley1
- Bees -- Oregon -- Willamette River Valley1
- Blueberries -- Pollination -- Oregon -- Willamette River Valley1
- Bumblebees -- Behavior -- Oregon, Western1
- Bumblebees -- Diseases -- Oregon, Western1
- Bumblebees -- Effect of pesticides on -- Oregon, Western1
- Bumblebees -- Food -- Oregon, Western1
- Bumblebees -- Habitat -- Oregon, Western1
- Bumblebees -- Mortality -- Oregon -- Corvallis1
- Bumblebees -- Oregon1
- Bumblebees -- Oregon, Western1
- Bumblebees -- Parasites -- Oregon, Western1
- Bumblebees -- Reproduction -- Oregon, Western1
- Colorado potato beetle -- Biological control1