C. flava

Calaphis flava Mordvilko, 1928

Yellow dark-veined birch aphid

1.9-2.7 mm
Aphid light green to yellow.
Apterous: antennae pale with articular sutures dark; abdomen with long hairs; patellae and tarsi darkened: cornicles short and light-colored, cauda knobbed and bilobed anal patch present.
Alate: antennae long and fine with alternate light and dark coloring; abdomen light colored; cornicles short and light, cauda knobbed, bilobed anal patch present; wings marked by somber-toned venation, especially anal vein, also by absence of part of the radial sector.

See identification file

Monoecious holocyclic

Plantes hôtes

Betula puberscens, B. verrucosa

Calaphis flava forms diffuse colonies on underside of young leaves.

Populations can be regulated by a hymenopteran : Aphidius aquilus.

Aphidius aquilus

In this folder

Modification date : 07 February 2023 | Publication date : 08 March 2017 | Redactor : Evelyne Turpeau, Maurice Hullé, Bernard Chaubet