C. juglandicola

Chromaphis juglandicola (Kaltenbach, 1843)

Small walnut aphid

Chromaphis juglandicola : nymphes 4
Chromaphis juglandicola : adulte ailé
Chromaphis juglandicola : nymphes

Morphological characteristics

1.5-2.6 mm.
Aphid yellowish to whitish, all parthenogenetic adults are alate.
Larva and nymph: antennae short with processus terminalis very short; abdomen covered with numerous hairs, sometimes small spots in pairs, cornicles short and light-colored, cauda knobbed.
Alate: antennae short with processus terminalis very short, cornicles short and light-colored, cauda knobbed, small black spot present on hind-femur.

See identification file

Life cycle

Monoecious holocyclic

Host plant

Juglans regia walnut

Particular characteristics

Chromaphis juglandicola colonizes the undersides of walnut leaves. The sexual forms appear in autumn.

In this folder

Modification date: 22 May 2024 | Publication date: 23 March 2017 | By: Evelyne Turpeau, Maurice Hullé, Bernard Chaubet