Ceutorhynchus napi Gyllenhal, 1837

Coleoptera, Curculionidae

Ceutorhynchus napi: larva in Brassica napus stem

Brassica napus, Hungary, Mosonmagyaróvár © László Érsek: larva boring in the stem

Ceutorhynchus napi: damage to Brassica napus stem

th stem swells and tears open (picture taken on April 9) …

Ceutorhynchus napi: damage to Brassica napus stem

… and becomes seriously destroyed (April 22)

mine

The larva essentially is a borer in petiole or stem. Some larvae (“many”, according to Hering [1957a], “1-3”, according to Scherf [1964a]) live there together in a cavity. At that point the stems is galled and swollen. From there sometimes a larva strays into the leaf blade.

hostplants

Brassicaceae, oligophagous

Barbarea intermedia; Brassica napus, oleracea, rapa; Raphanus raphanistrum; Sinapis arvensis; Sisymbrium altissimum, officinale.

phenology

Larvae in April-July (Scherf, 1964a).

BENELUX

BE observed (Curculionidae.be, 2010a).

NE observed (Fauna Europaea, 2007; Heijerman, 1993a).

LUX not observed (Fauna Europaea, 2007).

distribution within Europe

From Denmark and Poland tot the Iberian Peninsula and from France to Bulgaria; not in the British Isles (Fauna Europaea, 2007).

larva

Scherf (1964a).

references

Buhr (1964b, 1965a), Günthart (1949a), Heijerman (1993a), Hering (1957a), Scherf (1964a), Tomasi (2014a), Vorst (2010a).

13/04/2017

pub 13.iv.2017 · mod 28.vi.2017