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Liriomyza amoena

Leaf-mining fly Liriomyza amoena

Description

Liriomyza amoena is a leaf-mining fly whose larvae develop inside the leaves of elder species (Sambucus nigra, S. ebulus, S. racemosa). The larvae initially create a narrow, upper-surface corridor mine approximately 3 cm long, which suddenly expands into an irregular blotch mine. Secondary feeding lines are often visible inside the blotch. Pupation occurs outside the mine, with the exit slit located in the lower epidermis.

This species is monophagous and distributed across Europe, from Scandinavia to the Pyrenees, and the Baltic States, extending to Ireland, Corsica, and Spain. The damage is mainly aesthetic, but high larval densities can reduce the photosynthetic surface of leaves, leading to premature defoliation. Repeated infestations may weaken elder shrubs, making them more vulnerable to environmental stress factors.

Symptom

On affected elder leaves, irregular blotch mines appear, often incorporating an initial narrow corridor. Secondary feeding lines are visible within the mine, and the exit slit is located on the lower epidermis.

Tree Species: Elderberry

Part of a plant- attacked: Leaf / Needle

Pest significance: Less harmful

Pest Category: Insects

Invasive Species: No

Present in EU: Yes