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).