The oval larvae and pupae are yellow-green decorated with black branched thorny appendices.
The larvae pupate on the leaves and young beetles of the new generation feed intensively for one to two weeks to build up their fatty tissue.
They usually hibernate under fallen leaves at the edges of woods, in bushes or under plant residues in fields.
[1] This species causes damage to agricultural crops in the three families Solanaceae (potato, tomato, aubergine and pepper), Cucurbitaceae (cucumber, melon, water-melon and pumpkin) and Fabaceae (soya and haricot beans).
However the optimal host plant for the reproduction of over-wintered beetles and the development of their larvae is the potato.