Obolodiplosis robiniae


The tiny white larvae of the midge Obolodiplosis robiniae mine the leaves of the introduced False Acacia or Black Locust Tree (Robinia Pseudoacacia) causing the edge of the leaflet to roll downwards and thicken. Each roll may contain several white or yellowish larvae.

Identification difficulty

Adult Gall


Where the larval host species False Acacia (Robinia Pseudoacacia) occurs – usually in gardens or parks.

When to see it

The leaf roll galls can be seen when the host trees are in leaf.

Life History

There are several generations per year, the final one overwintering in the ground.

UK Status

First recorded in Britain in 2007 it first became established in the south-east but has rapidly spread north and westwards.

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