Overview

• Lasius neglectus has been confirmed in Karlsruhe’s Knielingen district, marking the fourth infestation site in Baden-Württemberg.
• Researchers warn the species can form supercolonies of millions that displace native insects and damage homes and infrastructure.
• Experts have yet to develop an effective eradication method and face delays because the ant closely resembles the common Lasius niger.
• Earlier this year, Tapinoma magnum outbreaks in Kehl caused power outages and playground closures, illustrating the risks posed by invasive ant supercolonies.
• German states are pressing for a national invasive species registry and stricter controls on Mediterranean plant imports to prevent further spread.