Subject
- Report (United States. Forest Service. Northern Region. Insect and Disease Management)3
- Conifers -- Diseases and pests -- Idaho2
- Conifers -- Diseases and pests -- Montana2
- Mountain pine beetle -- Montana2
- Report (United States. Forest Service. Northern Region. Forest Pest Management)2
- Aerial photography in forestry -- Idaho -- Coeur d'Alene National Forest1
- Armillaria root rot -- Idaho1
- Armillaria root rot -- Montana1
- Atmospheric sulphur dioxide -- Environmental aspects -- Montana1
- Bark beetles -- Idaho1
- Bark beetles -- Montana1
- Borers (Insects) -- North Dakota -- Bowman County1
- Braconidae -- Northwest, Pacific1
- Chalcid wasps -- Northwest, Pacific1
- Conifers -- Diseases and pests -- Control -- Montana -- Flathead National Forest1
- Conifers -- Diseases and pests -- Northwestern States1
- Conifers -- Diseases and pests -- Northwestern States -- Maps1
- Defoliation -- Idaho -- Clearwater National Forest -- Forecasting1
- Douglas fir -- Diseases and pests -- Control -- Bitterroot National Forest (Idaho and Mont.)1
- Douglas fir -- Diseases and pests -- Montana1