Holly-pest
Guides
Phytomyza ilicis
holly leaf miner, European Holly Leafminer
Phytomyza ilicis is a small agromyzid fly whose larvae create distinctive pale leaf mines in European holly (Ilex aquifolium). Native to Europe, it has been introduced to western North America where it became a significant pest of ornamental holly. The species is univoltine, with highly synchronized phenology: adults emerge in late spring to oviposit into the soft tissue of newly expanding leaves, and larvae feed internally until completing development the following spring. It has been extensively studied as a model system for understanding population regulation, density dependence, and multi-trophic interactions including parasitism and predation.