A common species throughout Belgium.
young larva makes a long, sinuous leaf-mine mainly on rosaceous
trees or bushes like Prunus cerasus, or on Betula.
It pupates in a silken cocoon which is suspended by silken threads
on either surface of a leaf. The imago hibernates, often in thatch or evergreens.
adults fly in three generations a year: June, August and from October
till April. They are mainly active at dusk but occasionally come
mine: a long, narrow tortuous gallery which frequently crosses the
midrib, frass linear, exit hole on upperside. The long and flattened
larva makes that the vacated larval chamber is proportionally longer
and readily distinguish it from nepticulid mines. On the place of the
oviposition (it never starts in the midrib) remains a small discoloured
scar which means that the egg is laid in the leaf (with an ovipositor)
and not on the leaf in the way Nepticulidae do (egg shell visible).
Antwerpen, Kapellen, 09 August 2004.
(Photo © Chris Steeman)