Sawadaea bicornis
This is a powdery mildew that affects the leaves of Field Maple. It becomes more noticeable in Autumn as a whitish covering on the leaves. If conditions are favourable it produces fruiting spores which can be seen through a lens as tiny yellow spheres amongst the powdered surface.
There are two almost identical species that can only separated by microscopic examination of the attachments on the chasmothecia.
A photo is needed showing both the mildew and the leaf so that it is recognisable as Field Maple.
on the leaves of Field Maple.
Mainly Autumn.
Common.
Common.
David Nicholls
Brocks Hill Country Park
25 September 2019
Graham Calow
Sharnford, Fosse Meadows
26 July 2020
mildew on Field Maple
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Species profile
- Common names
- Maple Mildew
- Species group:
- Fungi
- Kingdom:
- Fungi
- Order:
- Helotiales
- Family:
- Erysiphaceae
- Records on NatureSpot:
- 60
- First record:
- 03/08/2014 (Thompson, Peter)
- Last record:
- 03/10/2024 (lemmon, roy)
Total records by month
% of records within its species group
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