Ramularia primulae
A white mould that affects Primroses, causing brown leaf spots. Whitish tufts of conidia are present mainly on the leaf undersides. The conidia are long and parallel-sided, and formed in chains.
Ramularia interstitialis also affects Primula species. It causes pale green or yellowish leaf-spots and whitish caespituli; conidia are oval, formed singly
host/microscopy 
Photograph the leaf spots and conidia on the host. Microscopic examination of conidia is needed. Ensure you have noted the host-plant species in your comments
on Primula species - including primrose, cowslips and garden 'polyanthas'
sue
Swithland, St Leonard's churchyard
21 March 2026
on Primrose
sue
Swithland, St Leonard's churchyard
21 March 2026
sue
Swithland, St Leonard's churchyard
21 March 2026
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Species profile
- Species group:
- fungus
- Kingdom:
- Fungi
- Order:
- Mycosphaerellales
- Family:
- Mycosphaerellaceae
- Records on NatureSpot:
- 1
- First record:
- 21/03/2026 (Timms, Sue)
- Last record:
- 21/03/2026 (Timms, Sue)
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