Orchestes alni (Linnaeus, 1758)

Orchestes alni: occupied mine on Ulmus minor

Ulmus minor, SBB = Biddinghuizen, Spijk- en Bremerbergbos © Hans Jonkman

Orchestes alni: occupied mine on Ulmus minor

detail

8245

Ulmus glabra, Duin en Kruidberg

13881

Ulmus minor, Duin en Kruidberg: mine with cocoon

Orchestes alni mine

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), Yunakov, Nazarenko, Filimonov & Volovnik (2018a), Zoerner (1969a).