Phyllonorycter coryli

Nut leaf blister moth

Description

Phyllonorycter coryli, commonly known as the nut leaf blister moth, is a small moth in the Gracillariidae family with a wingspan of 7–9 mm. It is distributed across most of Europe, excluding part of the Balkan Peninsula. The larvae primarily feed on species within the Corylus genus, including Corylus avellana (common hazel), Corylus colurna, and Corylus maxima, as well as Ostrya carpinifolia. The larvae mine the upper surface of leaves, forming silvery, blotch mines. The pupae overwinter in cocoons inside the mines, with frass accumulated in the opposite corner. P. coryli has two generations per year, with larvae active in July and again from September to October.

Symptom

Leaves exhibit silvery, upper-surface blotch mines that may cause the leaf to contract. Multiple mines can occur on a single leaf, leading to a reduction in photosynthesis and premature leaf drop.

Tree Species: Hop Hornbeam, Hazel

Part of a plant- attacked: Leaf / Needle

Pest significance: Less harmful

Pest Category: Insects

Invasive Species: No

Present in EU: Yes