Putoniella pruni


Putoniella pruni is a small gall midge that causes a gall on Blackthorn and other Prunus species.

Identification difficulty

Adult Gall


Look for it in places with a lot of Blackthorn.

When to see it

Adult in April and May but the gall is more likely to be seen than the adult midge.

Life History

Larvae cause pouch or pocket-shaped swellings usually along the mid vein on leaves of various species of Prunus, but particularly on Blackthorn (Prunus spinosa). This swelling often reddens. Fully developed larvae drop to the soil and overwinter in the ground.

UK Status

Uncommon to rare - only two sites in Britain previously listed, one in Surrey and one in the west.

VC55 Status

First record for VC55 (Leicestershire and Rutland).

Leicestershire & Rutland Map


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

UK Map