Phyllachora graminis


Phyllachora graminis is a fungal plant pathogen that affects many grass species, including some of our most common grasses.  The upperside or underside of the leaves develop numerous, elongated, black blisters. Embedded in the tissue are cavities filled with asci or linear conidia. 

Identification difficulty
Recording advice

Please provide photographs and state the host grass species. Specimen should be microscopically examined.


Galls may be seen wherever the host grass species occur.

When to see it

Late summer and autumn.

UK Status

Widespread and fairly frequent in Britain.

VC55 Status

Probably fairly frequent, but under recorded in Leicestershire and Rutland.

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Leicestershire & Rutland Map


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

UK Map