Denmark battles oak processionary moth and invasive ant infestations

The oak processionary moth (Thaumetopoea processionea) has become a major pest in Denmark, with heavy infestations reported in Odense and over 2,000 trees affected in Berlin's Jungfernheide park. Authorities are deploying drones, gas burners and other measures to control the larvae.

Scientists warn that Denmark is also facing a wave of other invasive species. Professor Samuel Cushman of the University of Southern Denmark notes that the invasive ant Lasius neglectus, which forms super‑colonies with many queens, can overwhelm homes, gardens and even damage infrastructure. Biologist Rasmus Stenbak Larsen explains that climate change and global trade are accelerating the spread of such pests across Northern Europe.