Phylum: Ascomycota Class: Leotiomycetes
Order: Helotiales Family: Erysiphaceae
Species: Erysiphe alphitoides (Griffon & Maubl.) U. Braun & S. Takam.
Synonyms: Erysiphe quercina
Llwydni Blodiog y Dderwen
Microsphaera alphitoides
Microsphaera quercina
Microsphaera quercinum
Oak Mildew
Oak Powdery Mildew
Oidium alphitoides
Oidium quercinum
Common Name:


A Powdery Mildew
Click on the dots to get a species list for the 10km square that it represents.
This distribution map was produced using DMap
Erysiphe alphitoidesPhotographer: © David Mitchel
On Oak, Quercus sp.
Photographer: © David Mitchel

Have you a photograph, digital or otherwise that you would like to provide for this page? Or would you like to use this photograph? If so, please e-mail David Mitchel at the address given on the home page.

Or search Google Images for this species
View this species in its UK context on the NBN Atlas
Associated Species (where recorded) & number of records:
Quercus (6)
Quercus petraea (4)
Quercus robur (3)
Habitat (where recorded) & number of records:
Built up area, domestic (2)
Neutral grassland: semi-improved (2)
Parkland and scattered trees (2)
Woodland: broadleaved, semi-natural (2)
Woodland: mixed (2)
Parkland and scattered trees: broadleaved (1)
Parkland and scattered trees: mixed (1)
Scrub (1)
Woodland (1)
Woodland and scrub (1)
Woodland: broadleaved (1)
Woodland: broadleaved, plantation (1)
Woodland: coniferous, plantation (1)
Woodland: mixed, plantation (1)
Woodland: mixed, semi-natural (1)
Substrate (where recorded) & number of records:
Leaf (8)
Living leaf (2)
Months recorded in & number of records:
January (1)
July (1)
August (6)
September (17)
October (10)