Mediterranization continued: Chrysolina americana (Linnaeus, 1758) (Coleoptera: Chrysomelidae) in Serbia

Abstract

On May 13, 2025, an exceptionally large population of the rosemary beetle, Chrysolina americana, was recorded in a plantation of ornamental lavender in Belgrade, Serbia. Numerous adult beetles were observed and collected, mainly on lavender inflorescences, along with a small number of larvae, mostly found on the abaxial sides of the lavender leaves. The species appeared to be confined to a single lavender plantation, as neighboring plantations had not yet shown signs of colonization. This article provides the first official record of C. americana in Serbia, documenting the establishment of another Mediterranean-origin species in the country. We believe C. americana is a relatively recent invader, as indicated by its high abundance in the affected plantation yet limited spread. It is the 410th chrysomelid recorded in the Serbian fauna and the 26th, as well as the only allochthonous, species within its genus.