C. flava

Calaphis flava Mordvilko, 1928

Yellow dark-veined birch aphid
Calaphis flava : larve
Calaphis flava : adulte ailé

Morphological characters

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

Life cycles

Monoecious holocyclic

Host plants

Betula puberscens, B. verrucosa

Particular characteristics

Calaphis flava forms diffuse colonies on underside of young leaves.

Agronomic impact

Populations can be regulated by a hymenopteran : Aphidius aquilus.

Natural enemies

Aphidius aquilus

In this folder

Modification date: 06 May 2024 | Publication date: 08 March 2017 | By: Evelyne Turpeau, Maurice Hullé, Bernard Chaubet