Caloptilia azaleella (Brants, 1913)
Rhododendron spec., Belgium, prov. Liège, Cointe: mine and leaf roll, upperside © Jean-Yves Baugnée
Rhododendron spec., Drachten © Gerrit Tuinstra: mines and leaf rolls
Orange brown to rust-coloured lower-surface blotch, mostly near the midrib. Towards the end of the mining activity silk is deposited in the mine; this causes the mine to contract, folding the leaf over the mine. Frass packed in a corner of the mine. After some time the larva vacates the mine and lives free then in a leaf tip that has been rolled downwards and fixed with silk. Two of such cones are made and eaten out from the inside. Pupation in a membranous, shining cocoon at the underside of a leaf.
Rhododendron “hinomayo”, indicum, japonicum, simsii.
On ornamental “Azalea”, mostly in greenhouses, but in sheltered situations also in the open.
Larvae in June, September, sometimes again in late autumn (Emmet ea, 1985a).
BE recorded (Phegea, 2010).
NE recorded (Kuchlein & de Vos, 1999a; Microlepidoptera.nl, 2010).
LUX recorded (Fauna Europaea, 2010).
distribution within Europe
From Sweden to Portugal and Italy, and from Britain to Central Russia (Fauna Europaea, 2010).
Described by SCS Brown (1947a).
Sometimes a pest in greenhouses.
Aguiar & Karsholt (2006a), Bengtsson & Johansson (2011a), Biesenbaum (2010a), Brown (1947a), Buhr (1935a, 1964a), Buszko (1992b), Dekle (2016a), Emmet, Watkinson & Wilson (1985a), van Frankenhuyzen & Houtman (1972a), van Frankenhuyzen Houtman & Kabos (1982a), Hering (1925b, 1957a), Huisman & Koster (1994a, 1999a), Huisman, Koster, Muus & van Nieukerken (2013a), Huisman, Koster, van Nieukerken & Ulenberg (2001a), Klimesch & Skala (1936b), Kuchlein & Donner (1993a), Kuchlein & de Vos (1999a), De Prins (1998a), De Prins & Steeman (2013a), Pröse (2006a), Shin, Lee & Byun (2015a), Skala & Zavřel (1945a), Sønderup (1949a), Szabóky (2012a).