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1.4-2.6 mm.
Apterous: glossy, dark brown to black, cornicles black, long and straight.
Alate: body black with large black dorsal patch, antennae long and black, cornicles dark, long and slightly twisted, cauda dark and triangular.

See identification file

Dioecious holocyclic.

Primary hosts: Prunus cerasus (cherry) and rarely on other Prunus.
Secondary hosts: Galium (bedstraw), Veronica (speedwell).

M. cerasi causes serious damage to young nursery trees and plants. Its presence leads to severe malformation of young shoots (photo) and strong crinkling of leaves.
The honeydew emitted induces scorching and necroses on leaf blades.
If infestations are severe, the ends of shoots wither and die, and fruit growth and maturation are held back.