There are other less common species of fungi reported to be growing on
colonies of Erysiphaceae, such as the hyphomycetes Acremonium
byssoides, Akanthomyces lecanii, and Aphanocladium album (Sordariomycetes: Hypocreales) (Hawksworth, 1981). The usually
saprotrophic fungus Cladosporium oxysporum (Dothideomycetes:
Capnodiales) was found to arrest the development and maturation of the
ascospores of Phyllactinia corylea (Rao and Pavgi, 1978). Species
of Pseudozyma (Ustilaginomycetes: Ustilaginales) and Tilletiopsis (Exobasidiomycetes: Entylomatales) are occasionally
found parasitizing powdery mildews (Gafni et al., 2015; Gams et al., 2004; Klecan et al., 1990).