Exocentrus (Exocentrus) adspersus Mulsant, 1846

Subfamilia: LAMIINAE  /  Tribus: EXOCENTRINI
Exocentrus adspersus
[Photo © Daniel Rydzi]

Exocentrus adspersus, a common and in Europe widely distributed inhabitant of deciduous forests, is polyphagous in many deciduos trees (Corylus, Castanea, Fagus, Carpinus) but prefers oaks (Quercus spp). Larvae develop under the bark and in the wood mainly branches or trees of smaller diameters (1-7 cm). It attacks the branches of standing trees, uproots and branches lying on the ground cut off after felling. The larvae feed mainly sapwood, pupate in the wood in a pupal cell of irregular shape mostly just below the surface of the wood. Overwintering in the larval stage, life-cycle two years. The exit holes are broadly oval in shape. Adults occur from May to August, peak from the mid-June to mid-July. E. adspersus is predominantly crepustular and nocturnal species attracted by light, during the day adults usually sit on the underside of branches from which they can be easily beaten [❖].

Body length:5 - 8 mm
Life cycle:2 years
Adults in:May - July
Host plant:polyphagous in deciduous trees, but prefers oak (Quercus)
Distribution:Albania, Austria, Belgium, Bosnia and Herzegovina, Bulgaria, Corsica, Croatia, Czechia, France, Germany, Greece, Hungary, Italy, Luxembourg, Moldova, Montenegro, Poland, Romania, Russia, Serbia, Sicily, Slovakia, Slovenia, Spain, Sweden, Switzerland, Ukraine, Turkey

The depicted living beetles were: (DR) - collected in Kusín environs (Michalovce district, Košice Region, Slovakia) on June 24, 2019 and in Štitáre environs (Nitra district, Nitra region, Slovakia) on June 19, 2023; (ML/MP) - reared from a larva found in a dead oak (Quercus sp.) branch in Křivoklátsko Protected Landscape Area (Central Bohemia, Czechia) in spring 2021.

Collected by Daniel Rydzi and Miroslav Polcar

Sláma M.E.F.:
Tesaříkovití – Cerambycidae České republiky a Slovenské republiky / Cerambycidae of the Czech Republic and Slovak Republic.
Milan Sláma private printing, Krhanice, 383pp [pages 304-305], 1998 [ISBN: 80-238-2627-1]. [download pdf icon]

Exocentrus adspersus
[Photo © Daniel Rydzi]
Exocentrus adspersus
Exocentrus adspersus
Exocentrus adspersus
[Photo © Milan Lovětínský]

SubfamiliaLamiinae Latreille, 1825
TribusExocentrini Pascoe, 1864
GenusExocentrus Dejean, 1835
SubgenusExocentrus Dejean, 1835
SpeciesExocentrus (Exocentrus) adspersus Mulsant, 1846