Last modified: Jan. 21, 2020, 11:48 a.m.
So far still a very rare species in Belgium, but probably overlookes in many places as the food plant is very common.
See also bladmineerders.be
The adults fly from late May towards July. They come to light.
The larvae feed on the leaves of Thuya occidentalis as well as other Arborvitae and Chamaecyparis species. Infested trees for several consecutive years can be killed, but usually an infested tree is able to renew foliage later during the growth season.