Podosphaera amelanchieris

Podosphaera amelanchieris is a species of powdery mildew in the family Erysiphaceae. It is found across Europe and North America, where it affects the genus Amelanchier.

Podosphaera amelanchieris
Podosphaera amelanchieris on Amelanchier in the UK.
Scientific classification
Kingdom:	Fungi
Division:	Ascomycota
Class:	Leotiomycetes
Order:	Helotiales
Family:	Erysiphaceae
Genus:	Podosphaera
Species:	P. amelanchieris
Binomial name
Podosphaera amelanchieris Maurizio, 1927
Synonyms
Podosphaera oxyacanthae f. amelanchieris Jacz., 1927

Description

The fungus forms a thin, light, weak coating on host leaves, rarely distorting growth from the underside. Podosphaera amelanchieris, like most Erysiphaceae, is highly host-specific and infects only the genus Amelanchier.^[1] Another species of powdery mildew also infects this genus: Phyllactinia amelanchieris, which has weak, very thin, often smooth growth, on the undersides of leaves.^[2]

Taxonomy

The fungus was formally described in 1927 by Maurizio. The specific epithet derives from the host genus.