Plant Parasites of Europe

leafminers, galls and fungi

Orchestes pilosus

Orchestes pilosus (Fabricius, 1781)

Orchestes pilosus: mine on Quercus robur

Quercus robur, Castricum aan Zee

Orchestes pilosus: mine on Quercus robur


Orchestes pilosus: mine on Quercus robur

detail of the frass

Orchestes pilosus: mine on Querus robur

Quercus robur, Belgium, prov. Antwerp, Mol © Carina Van Steenwinkel: underside leaf, with oviposition scar

Orchestes pilosus

other leaf, upperside

Orchestes pilosus

lighted from behind; larva in the beginning of a cocoon

Orchestes pilosus

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).

host plants

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 (, 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).



Rhynchaenus pilosus.

parasitoids, predators

Chrysocharis nitidifrons; Tetrastichus miser.


Rare in the Netherlands. Common in the UK (Morris, 1993a).


Avgın & Colonnelli (2011a), Beiger (1979a), Buhr (1933a), Caillol (1954a), Compte (1981a), 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), Yunakov, Nazarenko, Filimonov & Volovnik (2018a).

Last modified 7.vii.2022