Gonioctena fornicata is a species of broad-shouldered leaf beetles belonging to the family Chrysomelidae, subfamily Chrysomelinae.

[1] This species is mainly found in Poland, Italy, South Russia, Albania, Bosnia, Croatia, Czech Republic, Bulgaria, Greece, North Macedonia, Romania, Jugoslavia, Southern Poland, Ukraine, Southern Russia, Turkey and Caucasus.

The larvae are yellow-gray, with black spots on the back and sides and three pairs of thoracic legs.

Both beetles and larvae mainly feed on the tender leaves and stem of the alfalfa plant (Medicago sativa), Trifolium and other Fabaceae species.

The microbial control with Btt could be very useful in alfalfa open fields on the contrary the chemical insecticides (e.g. neonicotinoids, etc.)