Orchestes betuleti (Panzer, 1795)
Ulmus x hollandica, Vreeland
Ulmus sp., Belgium, prov. Namur, Couvin gare, early august © Stéphane Claerebout
Oviposition in May-June in the underside of a strong vein, usually a lateral vein; here a large scare remains. From there a short full depth corridor runs in the direction of the leaf margin. The corridor suddenly widens into a large, transparent, brown blotch. Frass in the centre of the mine, which thereby gets a dark centre. The larva eventually pupates in a globular cocoon inside the mine.
Because the mine develops at a time that the leaf is fully deployed and hardened, the mine has no impact on the shape of the leaf, unlike the earlier O. alni).
Ulmus glabra, x hollandica, laevis, minor.
Preference for U. laevis (Rheinheimer & Hassler, 2010a).
Larvae in July-August (Hering, 1957a), June-August (Scherf, 1964a). Adults emerge in August (Rheinheimer & Hassler, 2010a).
BE not recorded (Curculionidae.be, 2010).
NE recorded (Heijerman, 1993a).
LUX not recorded (Fauna Europaea, 2007).
distribution within Europe
From Norway to France, Italy and Russia; not in the British Isles (Fauna Europaea, 2007).
Orchestes, Rhynchaenus, rufus (Schrank, 1781) – homonym. However, Delbol (2013a) presents rufus as a valid species.
Beiger (1979a), Buhr (1933a), Caillol (1954a), Delbol (2013a), Drăghia (1972a), van Frankenhuyzen & Houtman (1972a), van Frankenhuyzen, Houtman & Kabos (1982a), Hartig (1939a), Heijerman (1993a), Hering (1924b, 1930a, 1931a, 1957a), le Monnier (2003a), Rheinheimer & Hassler (2010a), Scherf (1964a), Sønderup (1949a), Vorst (2010a), Wolf & Fuchs (2014a), Yunakov, Nazarenko, Filimonov & Volovnik (2018a), Zoerner (1969a).