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Erysiphe alphitoides – Powdery mildew of oak

Synonyms: Erysiphe quercina, Microsphaera alphitoides, Microsphaera quercina, Oidium alphitoides, Oidium quercinum, Phyllactinia quercus.

Common names: powdery mildew of oak, oak mildew.

Russian name: Erizife dubovaya.

Extract from Wikipedia article: Erysiphe alphitoides is a species of fungus which causes powdery mildew on oak trees.

Photos of this mushroom from the area of St. Petersburg, Russia

Powdery mildew of oak (Erysiphe alphitoides) on oak seedlings in Dubki (The Oaks) Park in Sestroretsk, near Saint Petersburg. Russia, August 7, 2024
Мыс «Дубковский», Парк «Дубки», Saint Petersburg, 197706, Russia

Oak seedlings discolored by powdery mildew of oak (Erysiphe alphitoides) in Dubki (The Oaks) Park in Sestroretsk, near Saint Petersburg. Russia, August 7, 2024
Мыс «Дубковский», Парк «Дубки», Saint Petersburg, 197706, Russia

Whitish covering of oak leaves caused by powdery mildew of oak (Erysiphe alphitoides) in Dubki (The Oaks) Park in Sestroretsk, near Saint Petersburg. Russia, August 7, 2024
Мыс «Дубковский», Парк «Дубки», Saint Petersburg, 197706, Russia

Comments

• Search of mushroom species for given keywords "Erysiphe alphitoides" was done through catalogueoflife.org.
• Selection of a particular species from the list of 2 species was performed automatically.
• Attributes of the species were taken from catalogueoflife.org.
• There is a Wikipedia article about this mushroom.

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Acknowledgements

Russian web-forums Planeta Gribov, V Kontakte, and Griby Sredney Polosy for learning names of local mushrooms.

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