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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.

Warted puffball

Pathogen name: Lycoperdon perlatum Pers.

Western gall rust

Pathogen name: Cronartium harknessii E. Meinecke

  • Revision 2024

White butt rot - White laminated rot

Pathogen name: Ceriporiopsis rivulosa (Berk. & Curtis) Gilb. & Ryvarden

White mottled rot

Pathogen name: Ganoderma applanatum (Pers.) Pat.

White pine blister rust

Pathogen name: Cronartium ribicola J.C. Fisch.

White spongy trunk rot

Pathogen name: Fomes fomentarius (L.) Fr. (Common name for this fungus: tinder conk)

  • Revision 2024

White spongy trunk rot of hardwoods

Pathogen name: Spongipellis delectans (Peck) Murrill

White trunk rot of conifers

Pathogen name: Phellinus hartigii (Allesch. & Schnabl) Pat.

Willow scab

Pathogen name: Venturia saliciperda (Nüesch)

Wind damage

Pathogen name: Ruptio ventosa Nature

Winter drying injury

Pathogen name: Siccitas hiemalis Nature