Phyllocnistis vitegenella

American grape leafminer

Description

Phyllocnistis vitegenella, also known as the American grape leafminer, is a small moth from the Gracillariidae family, native to North America. Recently, it has appeared in European vineyards. This species is monophagous, feeding only on plants in the Vitaceae family. While it is not yet considered a significant pest, its rapid spread across several European countries, indicates a potential to become harmful at least localy. In Europe, Phyllocnistis vitegenella typically several generations per year, with the first generation completing its cycle in under a month. Larvae begin feeding on vine leaves in early May. The larvae create long, narrow, winding tunnels beneath the leaf cuticle, leaving behind a dark trail of frass. Pupation occurs in a small chamber at the end of the tunnel. Multiple tunnels can often be found on a single leaf, and as the infestation progresses, nearly all vine leaves may be affected. Monitoring vineyards for its presence is crucial as further spread could impact vine health.

Symptom

The larvae create long, narrow, winding tunnels beneath the leaf cuticle, leaving behind a dark trail of frass. Pupation occurs in a small chamber at the end of the tunnel. Multiple tunnels can often be found on a single leaf, and as the infestation progresses, nearly all vine leaves may be affected. Heavy infestation may cause leaf drop.

Tree Species: Virginia creeper, Grape

Part of a plant- attacked: Leaf / Needle

Pest significance: Less harmful

Pest Category: Insects

Invasive Species: Yes

Present in EU: Yes