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Ceuthorhynchus quadridens (Panzer)
Insecta, Coleoptera, Curculionidae .

Cabbage stem weevil

Description, Biology, Life Cycle, Damage, Common Names, Images


[R]Description
- Adult: 2.0 to 3.5 mm long, ashy grey. Pronotum strongly narrowed anteriorly. Tarsi, tips of tibiae and antennae reddish brown. Elytra dorsally with a white rectangular spot; striae much narrower than the interstices which are covered in whitish scales (*) .
- Larva: 3 to 5 mm, relatively elongated, white; head small, light yellow (*) .

[R]Biology
This weevil feeds on wild or cultivated brassicas: cabbage, cauliflower, coleseed, turnip, radish, mustard (Sinapis), horse-radish (Armorica).
- Adult: it overwinters under lumps of earth or under plant debris and resumes its activity in spring, 20°C is the optimal flight temperature. The female lays 2 to 8 eggs in the petiole or the young stems or along the main veins of the leaves.
Average fecundity, 80 eggs.
- Egg: embryonic development lasts 5 to 8 days.
- Larva: it forms a relatively large gallery which reaches to the pith and may extend down to the roots. The larvae from a same laying use the same gallery. Larval growth lasts 3 to 6 weeks until pupation, which takes place in the ground.
- Pupation lasts 3 weeks.

[R]Life Cycle
- 1 annual generation.
- The young adults appear in autumn. They move about on the plants for a few days then shelter to overwinter. They resume their activity from the end of March to the beginning of April.

[R]Damage
The attacked plants become yellow, their leaves lose their normal turgor and their development is slowed down.


[R]Common Names
DE: Kleiner Kohltriebrüssler, Gefleckter Kohltriebrüssler ES: Gorgojo del tallo de la col FR: Charançon de la tige du chou IT: Punteruolo delle nervature delle foglie delle rape PT: Gorgulho do caule da couve GB: Cabbage stem weevil

[R] Images

  1. Ceuthorhynchus quadridens (Panzer) (Coutin R. / OPIE)
    Adult
  2. Ceuthorhynchus quadridens (Panzer) (Coutin R. / OPIE)
    Larva in its sub-epidermal gallery The petiole epidermis has been removed to show the larva.
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