On some occasions, the aphid generates a filamentous cottony secretion, which protects them from external agents. They preferentially settle in cracks and wounds in woody areas, from where they extract the sap of various ornamental species (eg, poplar aphid, Phloeomyzus passeerinii) or agricultural species (woolly apple aphid, Eriosoma lanigerum).

(Cinara spp.) They usually settle in woody areas, sucking the sap and significantly reducing the vigor of the plant. and mainly affect species of pines, cedars, firs and cypresses. The most common are those of the genus Cinara (Cinara atlantica, Cinara cupressi).

Citrus aphid (Aphis spiraecola): Generally of the genus Aphys, they occur in both ornamental and agricultural species, causing serious damage. It is common for them to be polymorphs (with and without wings). They are usually organized in colonies, present on the underside of the leaves. A clear symptom of its presence are the curls in the young leaves.