Orchestes pilosus (Fabricius, 1781)
Quercus robur, Castricum aan Zee
detail of the frass
Quercus robur, Belgium, prov. Antwerp, Mol © Carina Van Steenwinkel: underside leaf, with oviposition scar
other leaf, upperside
lighted from behind; larva in the beginning of a cocoon
larva in the mine
Oviposition in the underside of a vein, usually the midrib. Here an oviposition scar remains. From this point a small full depth blotch develops, of about one cm in diameter, at the leaf margin, mostly in the leaf tip. The initial part of the mine, a quickly broadening corridor, later often tears in. Frass blackish-green, in short thread fragments, pasted to the upper epidermis. Pupation in the mine, in a globular cocoon, made from secretion that is produced by the larva itself (Scherf, 1964a).
Adult beetles eat linear windows, ± 1 cm long, in the upper surface of the leaf (Gallardo & Cárdena).
Fagaceae, broadly monophagous
Quercus ilex, petraea, pubescens, robur.
In southern parts of Europe also on evergreen Oaks.
Larvae in April-June (Hering, 1957a). Adults emerge in May, June (Rheinheimer & Hassler, 2010a).
BE recorded (Curculionidae.be, 2010).
NE recorded (Heijerman, 1993a).
LUX not recorded (Fauna Europaea, 2007).
distribution within Europe
From Norway, Ireland and France eastwards to Russia, Romania and Italy (Fauna Europaea, 2007).
Rare in the Netherlands. Common in the UK (Morris, 1993a).
Beiger (1979a), Buhr (1933a), Caillol (1954a), Delbol (2013a), Gallardo & Cárdenas (2017a), Heijerman (1993a), Hering (1923a, 1924a,b, 1930a, 1934g, 1936b), Maček (1999a), le Monnier (2003a), Morris (1993a), Rheinheimer & Hassler (2010a), Robbins (1991a), Scherf (1964a), Sønderup (1949a) Stammer (2016a), Tomov & Dimitrov (2007a), Vorst (2010a).