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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.

Red butt rot and sap rot

Pathogen name: Cryptoporus volvatus (Peck) Shear

Red heart rot

Pathogen name: Stereum sanguinolentum (Albertini & Schwein) Fr.

  • Revision 2024

Red ring rot

Pathogen name: Phellinus pini (Thore:Fr.) A. Ames

Rhabdocline pseudotsugae Syd.

Disease name: Douglas-fir needle cast

Rhizina root rot

Pathogen name: Rhizina undulata Fr.:Fr.

Rhytisma punctatum (Pers.:Fr.) Fr.

Disease name: Speckled tar spot

Rhytisma salicinum (Pers.:Fr.) Fr.

Disease name: Tar spot (Rhytisma salicinum )

Ribes-willow rust

Pathogen name: Melampsora ribesii-purpureae

Road salt injury

Pathogen name: Adustio salinaria Humain

Ruptio gelicidii Nature

Disease name: Ice break

Ruptio grandinis Nature

Disease name: Hail injury

Ruptio ventosa Nature

Disease name: Wind damage