Pathogens and diseases to recognize and understand

SEEDLING PATHOGENS
Pythium species Damping off
Fusarium oxysporum Fusarium root rot
Phoma eupyrena Top blight
Phytophthora species Phytophthora root rot

ROOT PATHOGENS
Phellinus weirii Laminated root rot
Armillaria ostoyae Shoestring root rot
Heterobasidion annosum Annosus root rot
Leptographium wageneri Blackstain root disease
Phytophthora lateralis POC root disease

STEM DECAY FUNGI
Fomitopsis pinicola Red belt, brown crumbly rot
Fomitopsis cajanderi Yellow-brown top rot
Echinodontium tinctorum Indian paint fungus, rust-red stringy rot
Phellinus pini Conk rot, red ring rot
Phaeolus schweinitzii Cow pie fungus, red-brown butt rot

MISTLETOES
Arceuthobium campylopodum Ponderosa pine dwarfmistletoe
A. douglasii Douglas-fir dwarfmistletoe
Douglas-fir mistletoe close
Phoradendron villosum Oak leafy mistletoe

RUST FUNGI
Cronartium ribicola White pine blister rust
Cronartium comandrae Comandra rust
Peridermium harknessii Western gall rust
Cronartium quercuum ssp fusiforme Fusiform rust

WILT PATHOGENS
Ophiostoma ulmi Dutch elm disease
Leptographium wagnerii Blackstain root disease
Leptographium species Blue stain

CANKER PATHOGENS
Atropellis piniphila Atropellis canker
Cryphonectria parasitica Chestnut blight
Phomopsis species Drought canker
Fusarium subglutinans Pitch canker
Phytophthora ramorum Sudden Oak Death

FOLIAGE PATHOGENS
Phaeocryptopus gaeumannii Swiss needlecast
Meria laricis Larch needle blight
Elytroderma deformans Pine needle cast
Dothistroma pini Red band needle blight
Phytophthora ramorum Sudden Oak Death

FOR EACH PATHOGEN/DISEASE, YOU SHOULD KNOW:
NAME
HOSTS
IMPORTANT IDENTIFYING FEATURES
BASIC LIFE CYCLE
KEY ENVIRONMENTAL INTERACTIONS
NATIVE OR EXOTIC TO NORTH AMERICA