Liriomyza trifolii

Definition

A species of leaf-mining fly (Diptera: Agromyzidae) whose larvae produce serpentine mines in the mesophyll of host-plant leaves. Adults are small, dark gray flies; larvae feed between the epidermal layers, leaving visible winding trails that expand into blotches as feeding progresses. The species is highly polyphagous and a significant pest of vegetable and ornamental crops worldwide.

Etymology

Liriomyza from Greek leirion (lily) + myza (to suck); trifolii from Latin trifolium (three-leaved plant, clover), referring to early host records.

Example

In commercial chrysanthemum greenhouses, Liriomyza trifolii populations can reach outbreak densities within a single generation, with larval mines rendering cut flowers unmarketable and necessitating integrated management combining yellow sticky traps, parasitoid releases of Diglyphus isaea, and selective insecticides.

Synonyms

• American serpentine leafminer
• celery leafminer

Related Terms

• leaf miner
• Agromyzidae
• Liriomyza
• serpentine mine
• polyphagy
• Diglyphus isaea

Usage Notes

Distinguished from the vegetable leafminer Liriomyza sativae and the pea leafminer Liriomyza huidobrensis by subtle morphological characters of the male genitalia and larval host preferences; accurate identification often requires dissection or molecular markers. The common name 'American serpentine leafminer' reflects its presumed New World origin, though it is now cosmopolitan.