Isochnus sequensi (Stierlin, 1894)

13407

Salix dasyclados, Cadzand

17745

Salix alba, Brummen: upper epidermis coloured like leather; all frass as a tar-like film on the floor of the mine

mine

Almost round, brown to brownish black, upper surface, very opaque blotch, about 1 cm in diameter, without an initial corridor. Upper epidermis leathery in colour. Often several mines in a leaf. All frass as a tar-like film on the floor of the mine. Egg shell at leaf underside, difficult to see, hyaline. Larva solitary. Pupation in the mine; pupa not in a cocoon.

hostplants

Salicaceae, oligophagous

Populus balsamifera, x canadensis, nigra; Salix alba, babylonica, caprea, cinerea, daphnoides, euxinia (fragilis), gmelinii, pentandra, purpurea, triandra, viminalis.

Salix is the main hostplant genus.

phenology

Larven in August-October (Hering, 1957a). The larvae pupate in September; soon after the adults emerge (Reinheimer & Hassler, 2010a).

BENELUX

BE in 2008 bred from Salix by Jorgen Ravoet; det. Theodoor Heijerman; see also Curuculionidae.be (2010).

NE recorded (van Frankenhuyzen & Freriks, 1986a; Heijerman, 1993a).

LUX not recorded (Fauna Europaea, 2007).

distribution within Europe

From Scandinavia, the UK and France to Bulgaria and Romania (Fauna Europaea, 2007).

larva

pupa

synonyms

Rhynchaenus, Isochnus populicola Silfverberg, 1977; Orchestes, Rhynchaenus populi (Fabricius, 1792).

notes

Hering (1957a) describes the species as very common and numerous; this is not generally true in the Netherlands, although it may suddenly be locally abundant on pollard willows (van Frankenhuyzen & Freriks, 1986a).

references

Buhr (1933a, 1964a), Caillol (1954a), Csóka (2003a), van Frankenhuyzen & Freriks (1986a), van Frankenhuyzen & Houtman (1972a), van Frankenhuyzen Houtman & Kabos (1982a), Haase (1942a), Heijerman (1993a), Hering (1930a, 1957a), Huber (1969a), Kleine (1924a/1925a), Kvičala (1938a), Maček (1999a), le Monnier (2003a), Nowakowski (1954a), Reinheimer & Hassler (2010a), Skala & Zavřel (1945a), Sønderup (1949a), Stammer (2016a), Starý (1930a), Trägårdh (1910a), Vidal (1988a), Vorst (2010a), Zlobin (1986b), Zoerner (1969a, 1970a).

31/03/2017

pub 31.iii.2017 · mod 25.vii.2017