Podosphaera ferruginea is a powdery mildew which affects Sanguisorba species such as Great Burnet and Salad Burnet.
Unless identified by a recognised expert, a photo is required and the specimen should be examined with a microscope. In the comments box, state the key or ID method used and describe the size and identifying characters.
The mildew may occur anywhere the host Sanguisorba species are found.
The mildew may be observed when the host Sanguisorba species are in leaf.
It seems to be widespread in Britain, but true status is difficult to determine due to lack of records.
Status in Leicestershire and Rutland not known.
Leicestershire & Rutland Map
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Yellow squares = NBN records (all known data)
Coloured circles = NatureSpot records: 2020+ | 2015-2019 | pre-2015