- Intro to Forest Pathology
- Natural Role of Tree Diseases
- Selection/ Thinning Agent
- Succesion (species change)
- Recycling (decay woody material)
- Wildlife Habitat (decay-cavity nest, broom-resting platform)
- Diversity (age, species and structural)
- Why Study It?
- study tree diseases in order to predict-minimize-avoid damage that affects mgmt goals
- BC loss estimates (million m3 / yr)
- decay ~10
- DMT ~4
- RR ~4
- Insects ~6 (**)
- Fire ~2
- What is a healthy forest (tree)?
- "normal" biological functions
- leaves photosynthesizing (making sugar)
- roots absorbing water & nutrients
- stem is translocating sugars & water to all parts
- growth (making fiber & wood)
- reproduce (cones/seeds)
- etc.
- resilient to short term stress
- able to adapt to long term changes (climate)
- * satisfies mgmt objectives
- habitat for fish & wildlife
- wilderness
- biodiversity
- sequester carbon
- water quality
- recreation & aesthetics
- products (timber, food, greenery)
- 3 Levels of Health
- individual tree
- forest stand - majority healthy (some sick, individuals die - new trees grow)
- forest ecosystem
- broad view ... "considers everything"
- interactions of all parts (plants, soils, animals, fungus, etc.)
- disturbances leave biological legacies
- landscape pattern (from disturbance) over time
- hydrology (water flow)
- carbon & ntrient cycling
- Basic Terms
- disease vs. pathogen vs. parasite
- parasite vs. saprophyte vs. symbiot
- signs vs. symptoms
- atrophic, hypertrophic, lesion, necrotic, chlorotic, resinosus, broom
- biotic vs. abiotic
-
- pathogen
- host
- suitable environment
- Management
- Variety of Forestry Goals
- how
- break the triangle
- usually by silviculture treatments
- Pathogen Groups
- abiotic agents
- mammals
- stem decay
- root disease
- stem rusts & cankers
- foliar disease
- seed / cone / seedling
- dwarf mistletoe
