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Aulagromyza fraxini

Leafminer fly Aulagromyza fraxini

Description

Aulagromyza fraxini is a leaf-mining fly from the Agromyzidae family, specialized in feeding on ash trees (Fraxinus spp.). The larvae create characteristic mines in leaves, initially forming fine, linear galleries that gradually widen. This species is monophagous, exclusively developing on members of the Fraxinus genus. It is widely distributed across Europe, particularly in regions where ash trees are common. While the infestation does not severely harm mature trees, heavy attacks can reduce photosynthetic efficiency, leading to premature leaf senescence and affecting tree aesthetics.

Symptom

Larvae form upper-surface leaf mines that begin as fine galleries, progressively widening. The mines contain frass in small rod-like formations along the edges. Pupation occurs externally, and vacated mines feature a characteristic semicircular exit slit.

Tree Species: Ash

Part of a plant- attacked: Leaf / Needle

Pest significance: Less harmful

Pest Category: Insects

Invasive Species: No

Present in EU: Yes