Asphondylia sarothamni


Asphondylia sarothamni is a midge that causes galls to form on Broom (Cytisus scoparius). There are two generations per year, each galling the Broom in a different way – see '‘Life History'’ below. The galls are seen more frequently than the midges.

Identification difficulty

Adult Gall


Wherever Broom (Cytisus scoparius) is found.

When to see it

See ‘'Life History'’ below.

Life History

Early in the year the first generation galls form on the developing flower buds of Broom. The adult midges that emerge from these galls go on to produce pod galls (2nd generation galls) - these may be quite variable. The midges emerge from the pod galls in June or July and oviposit into rudimentary buds, thus starting the cycle again. The eggs remain dormant in the buds until the following February or March. In both generations the inside of the gall is lined with mycelium, which is the actual larval food.

UK Status

Widespread but not well recorded in Britain.

VC55 Status

Uncommon or 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