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Ceuthorhynchus quadridens (Panzer)
Insecta, Coleoptera, Curculionidae .

Cabbage stem weevil

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

- 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 (*) .

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.

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)
  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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