Subject
- Pedicularis -- Diseases and pests -- Oregon1
- Pedicularis -- Diseases and pests -- Washington (State)1
- Pine needles -- Diseases and pests -- Histopathology1
- Pinus -- Diseases and pests -- Histopathology1
- Plant-pathogen relationships1
- Puccinia graminis -- Control1
- Report (United States. Forest Service. Northern Region. Insect and Disease Management)1
- Ribes -- Disease and pest resistance -- Genetic aspects1
- Ribes -- Flowering1
- Ribes -- Germplasm resources1
- Southwestern white pine1
- Western white pine1
- Western white pine -- Disease and pest resistance1
- Western white pine -- Diseases and pest -- Control -- Economic aspects -- California1
- Western white pine -- Diseases and pest -- Control -- Economic aspects -- Oregon1
- Western white pine -- Diseases and pests -- Northwestern States1
- Wheat -- Disease and pest resistance1
- Wheat -- Disease and pest resistance -- Genetic aspects1
- White pine -- Disease and pest resistance -- Idaho1
- White pine -- Diseases and pests -- Control1