Subject
- Ecological succession -- Idaho2
- Ecological succession -- Montana2
- Forest insects -- Ecology -- Idaho2
- Forest insects -- Ecology -- Montana2
- Pests -- Ecology -- Idaho2
- Pests -- Ecology -- Montana2
- Trees -- Diseases and pests -- Idaho2
- Trees -- Diseases and pests -- Montana2
- Cochylidae1
- Curculionidae1
- Douglas fir tussock moth -- Idaho1
- Douglas fir tussock moth -- Montana1
- Insects as biological pest control agents1
- Spotted knapweed -- Biological control1