S. dauci

Semiaphis dauci (Fabricius, 1775)

Daucus gall aphid

Semiaphis dauci : adulte ailé

Morphological characters

1.3-1.6 mm
Small aphid, blue-green to slightly pruinose
Apterous: cornicles dark, short, curved inwards, cauda linguate
Alate: antennae same length as body; abdomen light-coloured with presence of marginal plates, cornicles very short, curved inwards and dark, cauda pointed, dark

See identification file

life cycles

Monoecious holocyclic
In autumn, formation of male alates

Host plants

Carrot, cultivated or wild

Agronomic impact

Semiaphis dauci occupies the upper surface of leaves and leaflets, then the flower umbels.

Semiaphis dauci causes strong crinkling on carrot foliage, stunting of plants, even arrested growth of young shoots, and accentuated rolling of the leaves where the colonies take shelter. It can transmit the celery mosaic virus (CeMV) as well as several other viruses that depend on the non persistent mode.

In this folder

Modification date : 23 May 2024 | Publication date : 24 September 2014 | Redactor : Evelyne Turpeau, Maurice Hullé, Bernard Chaubet