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Bruchus signaticornis Gyllenhal
Bruchus pallidicornis Boheman

Insecta, Coleoptera, Bruchidae .

Lentil bruchid

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


[R]Description
- Adult: 2.8 to 3.5 mm long; dark brown. Prothorax short, largest towards its centre and the sides almost parallel posteriorly. Elytra flattened, with several light grey or white spots (*) .
- Larva: 3.0 to 3.5 mm long.

[R]Biology
- This bruchid is specific to lentil.
- Adult: lifespan 8 to 9 months. Average fecundity, 50 to 60 eggs.
- Eggs: length of development, 10-15 days; laid on the pod at the beginning of the seed's growth.
- Larva: development lasts 20 to 30 days; 1 larva per seed. The 1st-instar larva, mobile, penetrates the pod then the seed; it moults in the seed into an apodous 2nd-instar larva.

[R]Life Cycle
- 1 single annual generation. The adults formed in September in the seeds emerge only in June of the following year. Depending on the region, egg laying ranges from the end of May to the beginning of August.

[R]Damage
Each colonised lentil is almost completely destroyed.

[R]Remark/A>
Common species, more
harmful than B. lentis which is specially harmful in countries bordering the eastern Mediterranean. These 2 bruchids do not breed in grain stores.


[R]Common Names
DE: Linsenkäfer ES: Gorgojo de las lentejas FR: Bruche des lentilles IT: Tonchio delle lenticchie PT: Gorgulho das lentilhas GB: Lentil bruchid

[R] Images

  1. Bruchus signaticornis Gyllenhal (Coutin R. / OPIE)
    Lentil seeds infested by weevils

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