Walnut Leaf Gall Mite - Aceria erinea

Description

Aceria erinea is a mite that causes galls to form on the leaves of Walnut. Large yellowish blisters appear on the upper surface of the leaves with corresponding hollows on the underside which are lined with whitish or pale brown hairs among which the mites live and feed.

Identification difficulty

Adult Gall

Habitat

On Walnut.

When to see it

Whilst Walnut is in leaf.

Life History

The mites spend the winter in the buds.

UK Status

Can be fairly frequent where the host trees occur.

VC55 Status

Occasional in Leicestershire and Rutland.

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Leicestershire & Rutland Map

MAP KEY:

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

UK Map