Erysiphe penicillata

Erysiphe penicillata is a plant pathogen that causes powdery mildew on alder.

Spores of the anamorph of Erysiphe penicillata

Erysiphe penicillata
Scientific classification
Kingdom:	Fungi
Division:	Ascomycota
Class:	Leotiomycetes
Order:	Helotiales
Family:	Erysiphaceae
Genus:	Erysiphe
Species:	E. penicillata
Binomial name
Erysiphe penicillata (Wallr.) Fr., 1829[1]
Synonyms
Alphitomorpha penicillata Wallr., 1819 Microsphaera penicillata (Schltdl.) Cooke, 1865

It has also been reported to have affected certain species of Corylus including Corylus sieboldiana, Corylus colurna and Corylus heterophylla^[2], although this is doubtful following Bradshaw et al. (2021).