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Aceria ilicis

Gall mite of Holly oak

Description

This mite forms brown coatings on the underside of the holly oak Quercus ilex leaves. Coatings can be merged into a large patch. Inside coating (erineum) live small mites that are not visible to the naked eye. At the upper side of the leaves, the damage is seen as a slight swelling and discoloration of the leaf.

Symptom

Brown coatings on the underside of the holly oak Quercus ilex leaves.

Tree Species: Oak

Part of a plant- attacked: Leaf / Needle

Pest significance: Less harmful

Pest Category: Mites

Invasive Species: No

Present in EU: Yes