Diseases caused by pathogens
A pathogen is a living organism or virus directly capable of causing disease. The term “disease” is defined as a harmful deviation from the normal functioning of physiological processes. Many taxonomically diverse organisms become phytopathogenic (cause plant diseases) under suitable conditions. Plant pathogens can be categorized by their formal biological classification (taxonomy).
Index of disease names and scientific names of their causal pathogens
The entries for diseases caused by pathogens have sections containing nomenclature and taxonomy; general information and importance; distribution and hosts; symptoms and signs; disease cycle; damage; prevention and management; selected references; and photographs depicting various stages of the pathogen and the damage caused.
Phaeolus schweinitzii (Fr.) Pat. (Common names for the fungus: velvet-topped polypore, dyer’s polypore)
Disease name: Schweinitzii butt rot
Pholiota populnea (Pers.:Fr.) Kuyper & Tjall.-Beukers
Disease name: Yellow laminated butt rot of poplars
Pitted sap rot
Pathogen name: Trichaptum abietinum (Dicks.) Ryvarden (Common names for this fungus: purple conk fungus, purple-toothed polypore)
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Perenniporia subacida
(Peck) Donk
Disease name: Stringy Butt Rot
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Phacidium infestans
P. Karst
Disease name: Snow blight
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Phaeolus schweinitzii
(Fr.) Pat. (Common names for the fungus: velvet-topped polypore, dyer’s polypore)
Disease name: Schweinitzii butt rot
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Phellinus hartigii
(Allesch. & Schnabl) Pat.
Disease name: White trunk rot of conifers
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Phellinus igniarius
(L.:Fr.) Quél.
Disease name: Hardwood Trunk Rot
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Phellinus pini
(Thore:Fr.) A. Ames
Disease name: Red ring rot
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Phellinus tremulae
(Bondarzev) Bondarzev & Borisov in Bondarzev
Disease name: Aspen trunk rot
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Phellinus weirii-1
(Murrill) R. L. Gilbertson
Disease name: Laminated root rot douglas-fir form
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Phellinus weirii-2
(Murrill) R. L. Gilbertson
Disease name: Laminated root rot cedar form
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Pholiota populnea
(Pers.:Fr.) Kuyper & Tjall.-Beukers
Disease name: Yellow laminated butt rot of poplars
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Phomopsis canker of douglas-fir
Pathogen name: Diaporthe lokoyae Funk
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Phyllosticta minima
(Berk. & M.A. Curtis) Underw. & Earle
Disease name: Maple leaf spot
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Physiological needle droop
Pathogen name: Plicatura anomala gymnospermae Nature
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Pileated woodpecker
Pathogen name: Dryocopus pileatus L.
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Pine needle cast
Pathogen name: Lophodermella montivaga Petr.
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Pine needle cast
Pathogen name: Lophodermella concolor (Dearn.) Darker
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Pinicola brown crumbly rot
Pathogen name: Fomitopsis pinicola (Sw.:Fr.) P. Karst.
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Pitted sap rot
Pathogen name: Trichaptum abietinum (Dicks.) Ryvarden (Common names for this fungus: purple conk fungus, purple-toothed polypore)
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Pleurotus ostreatus
(Jacq.:Fr.) P. Kumm.
Disease name: Ostreatus white spongy rot
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Poplar leaf rust
Pathogen name: Melampsora larici-populina Kleb.
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Porcupine
Pathogen name: Erethizon dorsatum (Linnaeus)
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Postia sericeomollis
(Romell) Jülich
Disease name: Sericeomollis brown cubical butt
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Powdery mildew
Pathogen name: Sawadaea bicornis (Wallr.) Homma
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Pucciniastrum epilobii
G. Otth
Disease name: Fir-fireweed rust
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Pucciniastrum geoppertianum
(Kuehn) Kleb.
Disease name: Fir-blueberry rust