Orchestes alni (Linnaeus, 1758)
Ulmus minor, SBB = Biddinghuizen, Spijk- en Bremerbergbos © Hans Jonkman
detail
Ulmus glabra, Duin en Kruidberg
Ulmus minor, Duin en Kruidberg: mine with cocoon
Ulmus minor, Castricum; generally, the blotch section is situated in the leaf tip, but this isn’t a fixed rule
mine
Oviposition in the underside of the midrib; here an extensive scar remains visible. Form this point a full depth corridor runs towards the leaf tip, where it widens to a blotch. The apodous larva eventually pupates in a globular cocoon, made inside the mine. Because the mine is made at a time the leaf still is unfolding, the leaf can be strongly disfigured.
host plants
Ulmaceae, monophagous
Ulmus glabra, laevis, minor.
Preference for U. minor (Rheinheimer & Hassler, 2010a).
The reference to Quercus pubescens by Blanes-Dalmau ao is a mistake.
phenology
Larvae in May-June (Scherf, 1964a). Adults emerge in June (Rheinheimer & Hassler, 2010a).
BENELUX
BE recorded (Curculionidae.be).
NE recorded (Heijerman, 1993a).
LUX not recorded (Fauna Europaea (2007).
distribution within Europe
From the British Isles to Italy and from Poland to Moldova (Fauna Europaea, 2007).
larva
pupa
synonyms
Rhynchaenus alni; Orchestes, Rhynchaenus saltator (Geoffroy, 1785).
parasitoids, predators
Cirrospilus pictus; Pnigalio agraules; Tetrastichus leocrates, miser.
notes
Rather common.
references
Amsel & Hering (1933a), Beiger (1979a), Blanes-Dalmau, Caballero-López & Pujade-Villar (2017a), Buhr (1933a), Caillol (1954a), Delbol (2013a), Douglas, Bouchard, Anderson ao (2013a), van Frankenhuyzen & Houtman (1972a), van Frankenhuyzen Houtman & Kabos (1982a), Heijerman (1993a), Hering (1924a, 1930a,e, 1931a, 1957a), Kleine (1924/25a), Kollár (2007a), Kollár & Hrubík (2009a), Maček (1999a), le Monnier (2003a), Rheinheimer & Hassler (2010a), Robbins (1991a), Scherf (1964a), Skala (1936a), Stammer (2016a), Ureche (2010a), Utech (1962a), Vorst (2010a), Winkelmann & Bayer (2004a), Yunakov, Nazarenko, Filimonov & Volovnik (2018a), Zoerner (1969a).