Seseli libanotis, France, dépt. Ardennes, Givet, lieu-dit “Fort Condé” © Sébastien Carbonnelle

detail

Silaum silaus, Frakrijk, dép. Nord, Condé sur l’Escaut © Sébastien Carbonnelle

the growth severely be disturbed

galled parts die off

gall

The leaf veins are swollen, and the lamina between is pleated upwards. Between the folds, at the upperside, several larva that are red, with at maturity reddish anterior and posterior ends. Pupation in the ground.

host plants

Apiaceae, oligophagous

Seseli libanotis; silaus.