Golovinomyces orontii
Golovinomyces orontii is a powdery mildew which affects a range of hosts in several families, including plants in the Cucurbitaceae family (cucumbers, pumpkins, etc.). See Woods et al (2024) for a full host-list.
Other powdery mildew species may affect some hosts in the range; microscopic examination may be needed. Refer to Woods et al (2024) for details
host/microscopy 
Photograph the mildew on the host plant, and add host species to the comments for your record. Depending on host, microscopic examination will be needed to separate from similar species.
A wide range of herbaceous plants; often recorded on cultivated Cucurbitaceae (pumpkins, courgettes, etc.)
It is possible that this is a species complex of different closely related species that are more specific with regard to host plants
Graham Calow
Sapcote, Granitethorpe allotments
27 August 2022
on Pumpkin leaves
Graham Calow
Sapcote, Granitethorpe allotments
27 August 2022
on Pumpkin leaves
Graham Calow
Sapcote, Granitethorpe allotments
27 August 2022
on Pumpkin leaves
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Species profile
- Species group:
- fungus
- Kingdom:
- Fungi
- Order:
- Helotiales
- Family:
- Erysiphaceae
- Records on NatureSpot:
- 1
- First record:
- 27/08/2022 (Calow, Graham)
- Last record:
- 27/08/2022 (Calow, Graham)
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