Phytonomus postica , Hypera variabilis Herbst Insecta , Coleoptera , Curculionidae . Egg laying begins in autumn and continues into the spring, after an overwintering period. The eggs are laid in small cavities formed by the female at the base of the lucerne stems.
Older larvae devour the leaf lamina, leaving the veins.
When fully grown, each pupates in a loose cocoon spun on the leaves. The autumn egg layings period is the more important.