Erysiphe prunastri
Erysiphe prunastri is a powdery mildew found on on Prunus spinosa (Blackthorn) and other Prunus species.
Several other powdery mildews affect Prunus species - refer to Woods et al (2024) for more details. Microscopic examination is needed to separate them - see Phyllactinia mali, Podosphaera ampla, Podosphaera pannosa, Podosphaera pruni‐avium, Podosphaera pruni‐lusitanicae, Podosphaera tridactyla.
host/microscopy 
Photograph on host plant, and add host species to the comments for your record. Microscopic examination or verification by an expert before submission to NatureSpot may be needed
Blackthorn (Prunus spinosa) and similar species: Bullace (Prunus domestica ssp interstitia), Cherry Plum (Prunus cerasifera), St Lucie Cherry (Prunus malaheb), Bird Cherry (Prunus padus) - ref. Woods et al, 2024
Graham Calow
Sapcote, footpath near Calver Hill Quarry site
22 July 2020
on Blackthorn
det. R Lemmon from specimen
Graham Calow
Sapcote, footpath near Calver Hill Quarry site
22 July 2020
on Blackthorn
det. R Lemmon from specimen
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Species profile
- Species group:
- fungus
- Kingdom:
- Fungi
- Order:
- Helotiales
- Family:
- Erysiphaceae
- Records on NatureSpot:
- 10
- First record:
- 12/10/2017 (lemmon, roy)
- Last record:
- 18/09/2024 (lemmon, roy)
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