Heat Helps Oak Processionary Moth Spread in German Towns

Overview

• Local authorities have confirmed active, localized infestations this season in the Werra‑Meißner district, including Sontra, Vierbach, Ulfen–Krauthausen, Domäne Metzlar and Nentershausen.
• A municipal outbreak at the Bad Wörishofen outdoor pool forced temporary closures of parts of the site before the Bauhof removed nests, cleaned affected areas and reopened the restricted zones the same day.
• The caterpillar's fine hairs contain the toxin thaumetopoein and can trigger itching, skin inflammation, eye irritation and breathing problems because the hairs break off easily and can be carried by wind.
• Foresters said they will keep patrolling and posting signs but do not automatically remove the moth from native forest stands; property owners are legally required to report infestations to Ordnungsämter or Landratsämter and to take protective measures.
• Experts say warming temperatures favor more frequent and wider outbreaks by the oak processionary moth, raising the risk to people who use public green spaces near sun‑exposed oaks and prompting officials to urge reports and distancing of 10 to 15 meters from affected trees.