Last modified: April 20, 2020, 11:06 a.m.
Discovered new for Belgium in 2002 in LI. It has been confused with Caloptilia hauderi (Rebel, 1906), which thus far has not been found in Belgium. A very rare and local species in our country.
The adults of the first generation have a rather large yellowish blotch in the middle of the forewing costa, whereas in those of the second generation this blotch is reduced to an inconspicuous whitish line.
Caterpillar pale green with a light brown head capsule.
The mine starts as a short serpentine on the underside of a leaf. Later instars live freely in a cone which they construct by spinning down the edge of the leaf. The make three cones in their life cycle, each one a little larger than the previous one, and most often on different leaves.
See also gracillariidae.net and bladmineerders.be.
Yellowish white cocoon.
The species seems to prefer the higher parts of Acer campestre trees and even trees that grow in forests, not trees in hedge rows. This might explain why the species is rarely met with.
The full-grown larva constructs a cocoon near the margin of a leaf, mostly on the underside. The adults of the second generation hibernate and can be found till early May.
Two generations per year: May–June and June–July.
Monophagous on Acer campestre.