Podosphaera physocarpi

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

Podosphaera physocarpi
Scientific classification
Kingdom:	Fungi
Division:	Ascomycota
Class:	Leotiomycetes
Order:	Helotiales
Family:	Erysiphaceae
Genus:	Podosphaera
Species:	P. physocarpi
Binomial name
Podosphaera physocarpi (U. Braun) U. Braun, 2012
Synonyms
Sphaerotheca aphanis var. physocarpi U. Braun, 1984 Sphaerotheca macularis f. neilliae Jacz., 1927

Description

The fungus forms a chalky coating on the leaves of its host, coating and often significantly distorting leaves and stems up to whole shoots and inflorescences. It is the only species of powdery mildew on its host, and like many Erysiphaceae, only infects one genus.^[1]

Taxonomy

The fungus was formally described in 1984 by Uwe Braun, with the basionym Sphaerotheca aphanis var. physocarpi. This was then revised by Braun in 2012 with the name Podosphaera physocarpi.^[1]