Orchestes betuleti (Panzer, 1795)

Orchestes betuleti: mine on Ulmus x hollandica

Ulmus x hollandica, Vreeland

Orchestes betuleti: mine on Ulmus sp.

Ulmus sp., Belgium, prov. Namur, Couvin gare, early august © Stéphane Claerebout

mine

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).

host plants

Ulmaceae, monophagous

Ulmus glabra, x hollandica, laevis, minor.

Preference for U. laevis (Rheinheimer & Hassler, 2010a).

phenology

Larvae in July-August (Hering, 1957a), June-August (Scherf, 1964a). Adults emerge in August (Rheinheimer & Hassler, 2010a).

BENELUX

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).

larva

pupa

Scherf (1964a).

synonyms

Orchestes, Rhynchaenus, rufus (Schrank, 1781) – homonym. However, Delbol (2013a) presents rufus as a valid species.

references

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), Zoerner (1969a).

mod 2.v.2019