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German Counties Launch Helicopter Spraying To Contain Oak Processionary Moth

Officials say the low-flying spray runs aim to cut exposure to the caterpillars’ toxin-bearing hairs.

Overview

  • Multiple counties are carrying out or preparing large aerial treatments, with Prignitz planning more than 600 hectares by helicopter and Stendal scheduling 13 flights, while ground teams continue targeted removals.
  • Foray ES is the product being applied, a biological insecticide based on a soil bacterium that Germany’s environment agency recommends and that officials describe as non-toxic to people and other vertebrates.
  • Residents have been told to stay indoors during low helicopter passes, expect short road and area closures, and follow post-treatment rules such as 48-hour access bans and temporary limits on foraging in treated zones.
  • Weather and logistics are shaping the pace of operations, with some flights postponed and Ludwigslust-Parchim delaying its campaign because the contractor was still assigned elsewhere and calm, dry conditions are required.
  • Localities are pairing aerial work with fast, site-specific responses at schools and playgrounds, using digital reporting and specialist firms to remove nests within hours, reflecting a long-term shift as warmer, drier conditions help the pest spread.