Significantly greater infestation by oak processionary moths

In the spring and summer of 2026, there were closures due to the oak processionary moth. The Pflanzenschutzamt counted nearly twice as many affected sites as in 2025. A new strategy is being developed.

That is nearly twice as many as in the previous year, according to data from the Pflanzenschutzamt (Plant Protection Agency) included in the Senate’s response to a written inquiry. The population has been tracked for more than ten years. The data also shows significant increases from 2019 to 2020 and from 2024 to 2025.