Subject
- Canker (Plant disease) -- Oregon1
- Logging -- Environmental aspects -- Rogue River-Siskiyou National Forest (Or. and Calif.)1
- Phytophthora lateralis -- Oregon1
- Phytophthora lateralis -- Rogue River-Siskiyou National Forest (Or. and Calif.)1
- Port Orford cedar -- Disease and pest resistance -- Oregon1
- Port Orford cedar -- Diseases and pests -- Transmission -- Rogue River-Siskiyou National Forest (Or. and Calif.)1
- Root rots -- Transmission -- Rogue River-Siskiyou National Forest (Or. and Calif.)1
- Roots (Botany) -- Diseases and pests -- Oregon1
- Stigmina -- Oregon1