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Eotetranychus tiliarium

Lime spider mite

Description

Eotetranychus tiliarium, commonly known as the lime spider mite, primarily targets Tilia species, such as Tilia cordata, but can also infest a variety of deciduous trees including maple (Acer), alder (Alnus), and others. This mite overwinters as adults near the base of the trunk or under nearby foliage and becomes active in early spring. It migrates to the canopy, colonizing the undersides of young leaves. Feeding by puncturing cells causes characteristic pale mottling on the upper leaf surface, which gradually leads to a faded, bronze-like appearance. Severe infestations result in early leaf drop, especially in lower crown areas, potentially impacting the tree’s vitality and detracting from its aesthetic appeal. Eotetranychus tiliarium thrives in warm, dry conditions and can produce up to five generations annually in urban settings.

Symptom

Infested leaves display fine speckling and yellow spots that gradually merge, turning the green color of the leaf to a bronze hue. Heavily damaged leaves may turn brown, curl, and drop prematurely.

Tree Species: Hawthorn, Apple Tree, Maple, Alder, Lime, Rose, Cotoneaster

Part of a plant- attacked: Leaf / Needle

Pest significance: Harmful

Pest Category: Mites

Invasive Species: No

Present in EU: Yes