Erysiphe alphitoides (Griffon & Maubl.) U. Braun & S. Takam. 2000, Schlechtendalia 4: 5 [current name]
  ≡ Microsphaera alphitoides Griffon & Maubl. 1912, Bulletin trimestriel de la Société mycologique de France 28(1): 103 [basionym]
= Erysiphe alphitoides var. chenii (U. Braun) U. Braun & S. Takam. 2000, Schlechtendalia 4: 5
  ≡ Microsphaera alphitoides var. chenii U. Braun 1982, Mycotaxon 15: 139
= Erysiphe quercina Schwein. (1832) [1834], Transactions of the American Philosophical Society, New Series 4(2): 270
  ≡ Microsphaera quercina (Schwein.) Griffiths 1899, Bulletin of the Torrey Botanical Club 26: 144
= Oidium alphitoides Griffon & Maubl. 1910, Bulletin trimestriel de la Société mycologique de France 26: 137
= Oidium quercinum Thüm. 1878, Jornal de sciencias mathematicas, physicas, e naturaes, Lisboa, 1 Series 6(nos 21-24): 233
= Microsphaera penicillata f. fagi Jacz. 1927, Karmannyi opredelitel’ gribov. II. Muchnisto-rosjanye griby: 355
= Microsphaera alni f. quercus-glanduliferae Hara, Dainippon Sanrin Kwacho (Journal of the Japanese Forest Society) 392: 64 (1915)
= Microsphaera dentatae Liou 1931, Contributions from the Institute of Botany, National Academy of Peiping 1: 19
  ≡ Microsphaera alni var. dentatae (Liou) F.L. Tai 1935, Bulletin of the Chinese Botanical Society 1: 22
= Microsphaera quercus Sawada 1951, Bulletin of the Government Forest Experimental Station Meguro 50: 122 [orthographic variant: Microsphaera querci]
?= Erysiphe gorlenkoi (F.T. Chien) Giril. & Gulis, in Girilovich, Gulis, Khramtsov & Poliksenova, Mikologija i Fitopatologija 39(4): 26 (2005)
  ≡ Microsphaera gorlenkoi F.T. Chien 1975, Mikologija i Fitopatologija 9(3): 255

This mildew species should be assessed as LC as it is an expanding species with already numerous populations.

Please note that only countries where the species has been confirmed by genetic means. First reported in Europe during the 20th century.

This species occur on alive leaves of a wide range of monocots species including Aegle marmelos; Aesculus hippocastanum; Ailanthus altissima; Castanea sativa; Cocculus trilobus; Cotinus coggygria; Eucalyptus gunnii; Euonymus japonica; Exochorda racemosa; Fagus sylvatica; Ipomoea obscura; Mangifera indica; Piptanthus nepalensis, Quercus acutissima, alba, dalechampii, dentata, canariensis, castaneifolia, cerris, crispula, faginea, frenetto, ×hispanica, macanthera; petraea (including subsp. iberica), pubescens, pyrenaica, robur, ×rosacea, rubra, rugosa, serrata & ×streimii; Wisteria brachybotrys, chinensis & frutescens.
This species can be found in various environments, including urban areas.

Treatment of infected hosts results in the death of the mycelia.