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Bark Beetles Start Swarming in Germany, Prompting Urgent Calls to Fell Infested Spruce

A warm, dry summer could quickly reverse the recent drop in infestation.

Overview

  • Forestry agencies report the season’s first major swarm flights in Thuringia and across Bavaria after a warm spell near 20°C.
  • Landowners are urged to check last year’s hit stands and sun‑facing slopes and to fell and remove any infested trees immediately.
  • Bavaria’s monitoring shows statewide activity in almost all elevations, with early hotspots in Upper Bavaria, Swabia and along the Jura escarpment.
  • Spring dryness has already weakened shallow‑rooted spruce, which rely on resin to push out attacking beetles.
  • In Baden‑Württemberg, researchers expect fewer cases overall, yet a belt from Zollernalbkreis through Rottweil to Ravensburg remains the most at risk.