Germany battles widespread oak processionary moth outbreak

The oak processionary moth (Eichenprozessionsspinner) has spread dramatically across German cities this summer, prompting health warnings and control efforts. In Berlin, authorities reported around 240 complaints, with extensive infestations in parks such as Volkspark Jungfernheide, Friedrichshain‑Kreuzberg, and Lichtenberg, leading to temporary closures of some sport facilities. Frankfurt’s green‑space department has sealed off parts of several parks, including Waldspielpark Tannenwald and Mainuferpark Süd, while offering a hotline for residents. Marl observed a reduction in caterpillars after intensified measures, and Karlsruhe issued signage in its city forest to alert the public. In Zweibrücken, the pest’s presence in streets, parks and near schools has raised concerns, though no specific exclusion zones are currently marked.

The caterpillars’ tiny urticating hairs contain the toxin thaumetopoein, causing skin rashes, intense itching, eye irritation, respiratory problems and, in severe cases, allergic shock for people and pets, especially dogs. Health authorities advise avoiding contact, rinsing exposed skin and clothing with water, and seeking medical attention for serious reactions. Control strategies focus on early‑season insecticide applications (April‑May) and mechanical removal of nests by specialized crews using suction devices. Resources are limited, so efforts target hotspots such as schools, kindergartens, playgrounds and heavily frequented paths. Climate change‑driven warm, dry springs have amplified the moth’s reproduction, leading to a nationwide rise in infestations and prompting coordinated monitoring by municipal green‑area offices and forest agencies.