Last modified: Oct. 3, 2020, 2:45 p.m.
A common species throughout Belgium.
A tough, white cocoon attached to the roof and the bottom of the mine. In contrast to most other Phyllonorycter species, the black frass is not concentrated in a corner of the mine, but incorporated as a U-formed shape around the cocoon.
The egg is oviposited on the underside of a leaf.
The species hibernates in the pupal stage, inside the cocoon between the fallen leaves among leaf litter on the ground.
The pupa protrudes through the underside of the mine just before emergence of the adult. The adults rest on the tree trunks or the foliage. They become active at dusk and come to light.
Two generations a year: April–May and August–September.