Golovinomyces cichoracearum

Alternative names
Erysiphe cichoracearum

Golovinomyces cichoracearum is a fungal plant pathogen that causes a powdery mildew on various plants including Prickly Sow-thistle, Nipplewort,  melon, cucumber, pumpkin, and squash. The primary symptoms are white, powder-like spots on the leaves and stems.

Similar Species

Sphaerotheca fuliginea causes a similar looking powdery mildew of cucurbits

Identification difficulty
Recording advice

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.


Wherever the host plants occur.

When to see it

Summer and early autumn.

UK Status

It seems to be widespread in Britain.

VC55 Status

Status in Leicestershire and Rutland not known.

Leicestershire & Rutland Map


Yellow squares = NBN records (all known data)
Coloured circles = NatureSpot records: 2020+ | 2015-2019 | pre-2015

UK Map

Species profile

Species group:
Records on NatureSpot:
First record:
23/10/2014 (Thompson, Peter)
Last record:
28/10/2022 (lemmon, roy)

Total records by month

% of records within its species group

10km squares with records

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