Erysiphe russellii
A powdery mildew found on non-native sorrels, including the small yellow-flowered Oxalis exilis and O corniculata
Leveillula oxalidicola is listed as the powdery mildew affecting the native Oxalis acetosella; also possibly Golovinomyces orontii (ref. Woods et al, 2024)
host 
Photograph the mildew on the host plant; ensure you have noted the host plant species in your comments
non-native Oxalis
rarely recorded
sue
Bagworth
01 August 2026
on Oxalis exilis
sue
Bagworth
01 August 2026
sue
Bagworth
01 August 2026
conidia
sue
Bagworth
01 August 2026
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Yellow squares = NBN records (all known data)
Coloured circles = NatureSpot records: 2025+ | 2020-2024 | pre-2020
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Species profile
- Species group:
- fungus
- Kingdom:
- Fungi
- Order:
- Helotiales
- Family:
- Erysiphaceae
- Records on NatureSpot:
- 1
- First record:
- 01/08/2026 (Timms, Sue)
- Last record:
- 01/08/2026 (Timms, Sue)
Total records by month
% of records within its species group
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