Orchestes rusci (Herbst, 1795)
Betula pendula, Russia, Moscow region, Ramensky district, village Zhukovo, 18.vi.20118 © Andrey Ponomarev
same mine, lighted from behind
now with excision
imago, with frass and feeding traces
Betula pendula, Belgium, prov. Antwerp, Retie, Prinsenpark, 25.v.2014 © Carina Van Steenwinkel
Betula pendula, Belgium, prov. East Flanders, Ename, Volkegembos, 23.v.2015 © Carina Van Steenwinkel
Betula pendula, Spanderswoud, 24.vi.2006
Betula pubescens, Amstelveen, JP Thijssepark, 6.vii.2008: the excision is almost finished
A rather stubby, gradually widening, corridor that usually begins near the leaf tip and descends along the leaf margin (especially in the first generation). The larva lies venter-upward in the mine. Finally an almost perfectly circular excision is cut, in which the larva drops to the ground for pupation.
Betula humilis, nana, pendula, pubescens.
Larvae in May-June, in two generations (Hering, 1957a; Scherf, 1964a). However, Rheinheimer & Hassler (2010a) write of but one generation, of which the adults emerge in July.
BE recorded (Curculionidae).
NE recorded (Heijerman, 1993a; Vorst, 2010a).
LUX not recorded (Fauna Europaea, 2010).
distribution within Europe
From the British Isles and France till Poland, Roumania and Italy (Fauna Europaea, 2007).
Morris (1993a) calls the species common in the UK; this certainly does not apply to the Netherlands. Roques (1998a) mentions also Populus nigra as a host plant, but his description of the mine (‘long, slender, winding’) suggests that he had a different species before him.
Ahr (1966a), Bachmaier (1965a), Braunert (2017a), Buhr (1933a, 1964a), Caillol (1954a), Haase (1942a), Heijerman (1993a), Hering (1924b, 1927b, 1930a, 1957a), Kozlov, van Nieukerken, Zverev & Zvereva (2013a), le Monnier (2003a), Morris (1993a), Nowakowski (1954a), Rheinheimer & Hassler (2010a), Robbins (1991a), Roques (1998a), Roques, Cleary, Matsiakh & Eschem (2017a), Scherf (1964a), Seidel (1926a), Skala (1951a), Sønderup (1949a), Viramo (1962a), Vorst (2010a), Zoerner (1969a)