This species galls the leaves of Ash with many white larvae in a pod formed by partial or complete thickening and upfolding of leaflet over the midrib.
Wherever Ash, the host plant is found.
Late spring to early summer
Univoltine, pupates in the soil.
Widespread and common
Leicestershire & Rutland Map
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Yellow squares = NBN records (all known data)
Coloured circles = NatureSpot records: 2020+ | 2015-2019 | pre-2015