Livia junci

Alternative names
Livia juncorum

Livia junci is a small (2.5 mm) brown jumping plant louse that causes galls to form on certain Juncus rush species. The shoots become shortened and thickened and bunch into a mass up to 8 cm long including the flowers whose parts become leafy and thickened; reddish at first, later brown.

Identification difficulty

Adult Gall


Wet areas where certain Juncus species such as Sharp Rush, Jointed Rush and Toad Rush are present.

When to see it

June to October.

UK Status

Widespread and locally frequent in Britain.

VC55 Status

Appears to be uncommon in Leicestershire and Rutland but this is probably due to under recording.

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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