Aceria ilicis

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Description

Aceria ilicis is a mite which causes felt galls to form on the leaves of Holm Oak. The upperside of the leaf may have a bulge about 2 to 3mm high, with a corresponding depression on the underside with a rusty brown erineum; usually several galls on a leaf; mites live amongst the hairs. The gall is seen more readily than the mite.

Identification difficulty

Adult Gall

Habitat

On the leaves of Holm Oak.

When to see it

All year round.

UK Status

Seems to be fairly frequent but under recorded in Britain.

VC55 Status

Little recorded but probably fairly frequent in Leicestershire and Rutland.

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  • Maggie Frankum
    University of Leicester Botanic Garden, Oadby
    20 March 2014
    Aceria ilicis mite gall on Holm Oak, upper leaf surface
  • Maggie Frankum
    University of Leicester Botanic Garden, Oadby
    20 March 2014
    Aceria ilicis mite gall on Holm Oak, lower leaf surface

Leicestershire & Rutland Map

MAP KEY:

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

UK Map