translate English to French: The gall midge Cystiphora sonchi oviposits through the stomata of perennial sow-thistle (Sonchus arvensis) leaves, and requires tissues that are conducive to gall formation.
La cécidomyie Cystiphora sonchi pond ses oeufs dans les stomates des feuilles du laiteron Sonchus arvensis et il lui faut des tissus qui favorisent la formation de galles.