C. grassii

Crypturaphis grassii Silvestri 1935

Italian alder aphid

2.2-3.0 mm

Colony with individuals pressed onto leaf veins, larvae yellow or green, apterous adults yellow striped with brown and alates show a dorsal patch

Apterous: almost round and flat, yellow striped with brown, frontal tubercles strongly developed

Alate: head with frontal tubercles prominent, antennae short, abdomen with a dorsal patch with varying degrees of development

See identification file

Monoecious holocyclic

Alnus cordata, Italian alder

Colonies settle along leaf veins, preferring the underside. The individuals are extremely flat.

Natural enemies

In this folder

Modification date : 07 February 2023 | Publication date : 06 February 2017 | Redactor : Evelyne Turpeau, Maurice Hullé, Bernard Chaubet