La Chrysomèle de l’ambroisie (Ophraella communa) en France : perspectives pour le contrôle biologique de l’ambroisie

Abstract

The unintentional introuction of the ragweed leaf beetle (Ophraella communa) in France marks a significant step in the biological management of common ragweed (Ambrosia artemisiifolia), an invasive plant with major health impacts. Originally from North America, like ragweed itself, this beetle has recently naturalized in several regions of Europe, before being observed for the first time in France in 2023. Scientists are tracking the population dynamics of O. communa, examining its dispersal mechanisms, and assessing its potential as a natural biocontrol agent against ragweed. While promising, this introduction raises questions about the ecological impact of the exotic beetle in this new ecosystem.