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Phyllotreta nemorum L.
Insecta, Coleoptera, Chrysomelidae .

Large striped flea beetle, Striped turnip flea beetle

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

[R]Description
- Adult: 3.0 to 3.5 mm long; head and thorax greenish black, elytra black with a large yellow lateral band; femora and tarsi black, tibiae red (*) .
- Egg: attached by mucus to the underside of the leaves or along the veins.
- Larva: 5 to 6 mm long, very narrow, yellow, apart from the head and the legs which are black; numerous small brown plates on the body.

[R]Biology
- Host plant: wild or cultivated brassicas such as cabbage and rape.
- Adult: it lives on the leaves of brassicas which it scrapes and perforates, particularly in warm and dry weather. In cold or humid weather, it remains hidden under the foliage or in the ground.
- Egg: embryonic development lasts about 10 days.
- Larva: it penetrates inside a leaf and develops between the two epidermal layers, forming a mine which will eventually reach a diameter of 6 to 8 mm. It then pupates in the ground.

[R]Life Cycle
- 1 generation per year.
- The young adult appears at the beginning of July. It feeds at the expense of the host plant until the end of November, then overwinters in cracks in the ground or under leaves. Activity resumes beginning-April and oviposition occurs in mid-April.

[R]Damage
- The young adult can be harmful to autumn-sown crops, especially in warm and sunny weather; it also damages the young spring-sown crops when its activity resumes after overwintering (*) .

[R]Common Names
DE: Großer gelbstreifiger Kohlerdfloh ES: Altica de las crucíferas FR: Altise des crucifères IT: Altica delle crucifere PT: Áltica das crucíferas GB: Large striped flea beetle, Striped turnip flea beetle

[R] Images

  1. Phyllotreta nemorum L. (Coutin R. / OPIE)
    Adult Swollen femur of hind legs.
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  2. Phyllotreta nemorum L. (Coutin R. / OPIE)
    Damage on nursery cabbage seedling

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HYPPZ on line : Species (scientific name), Pests (common names), Glossary, Crops.

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