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.