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1.4-2.6 mm.
Apterous: yellowish grey, strong pruinosity, with reddish brown area at base of cornicles.
Alate: yellowish, abdomen with large dark patch, numerous rhinaria on antennae, cornicles short, straight and pigmented, cauda short and triangular.

See identification file

Dioecious holocyclic and anholocyclic on secondary host.

Primary host: Crataegus (hawthorn).
Secondary hosts: Apiaceae: Daucus (carrot), Apium (celery), Foeniculum (fennel), Petroselinum  (parsley) for example.

The morphological characters cannot help separate these three closely related species: Dysaphis apiifolia (Theobald, 1923), D. crataegi (Kaltenbach, 1843), D. foeniculus (Theobald, 1923).
They in fact make up a complex of species which are strongly similar and can hybridize.
Dysaphis apiifolia is the the most highly polyphagous species of the group.
Certain populations survive all year in the anholocyclic form.
They are visited by ants which build shelters for them in the ground.

These species live at the necks of plants or in the leaf sheaths of their secondary hosts.