Subject
- Douglas fir tussock moth -- Idaho6
- Douglas fir tussock moth -- Montana5
- Douglas fir -- Diseases and pests -- Idaho3
- Report (United States. Forest Service. Northern Region. Forest Pest Management)3
- Douglas fir -- Diseases and pests -- Montana2
- Douglas fir tussock moth -- Biological control -- Idaho -- Clearwater National Forest2
- Douglas fir tussock moth -- Idaho -- Nezperce National Forest2
- Douglas fir tussock moth -- Viruses -- Idaho2
- Douglas fir tussock moth -- Washington (State)2
- Aerial spraying and dusting in forestry -- Idaho1
- Conifers -- Diseases and pests -- Idaho1
- Conifers -- Diseases and pests -- Idaho -- Nezperce National Forest1
- Defoliation -- Idaho -- Clearwater National Forest -- Forecasting1
- Douglas fir -- Diseases and pests -- Idaho -- Nezperce National Forest1
- Douglas fir -- Idaho -- Diseases and pests -- Computer simulation1
- Douglas fir tussock moth -- Biological control -- Idaho1
- Douglas fir tussock moth -- Eggs -- Idaho1
- Douglas fir tussock moth -- Eggs -- Montana1
- Douglas fir tussock moth -- Idaho -- Clearwater National Forest1
- Douglas fir tussock moth -- Idaho -- Computer simulation1