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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.

Naohidemyces vaccinii (Wint.) Sato, Katsuya et Hiratsuka

Disease name: Hemlock - Blueberry rust

Nectria canker

Pathogen name: Neonectria ditissima (Tul. & C. Tul.) Samuels & Rossman

  • Revision 2024

Nectria dieback

Pathogen name: Nectria cinnabarina (Tode:Fr.) Fr.

Needle blight (Meria laricis)

Pathogen name: Meria laricis Vuillemin

Needle cast

Pathogen name: Isthmiella faullii (Darker) Darker

Needle cast (Bifusella linearis)

Pathogen name: Bifusella linearis (Peck) Höhn.

Needle cast (Lirula macrospora)

Pathogen name: Lirula macrospora (R. Hartig) Darker

Needle cast (Lophodermium pinastri )

Pathogen name: Lophodermium pinastri (Shrad.:Fr.) Chev.

Needle cast (Lophodermium seditiosum)

Pathogen name: Lophodermium seditiosum Minter, Staley, & Millar

Needle rust of pine

Pathogen name: Coleosporium asterum (Diet.) Syd.

Neolentinus kaufmannii (A. H. Smith) Redhead & Ginns

Disease name: Brown pocket rot of Sitka spruce

Neonectria faginata (Lohman et al.) Castl.

Disease name: Beech bark disease