Germany battles invasive oak pests as moths and lace bugs threaten forests

In the Heppdiel area of the Miltenberg district, specialists removed nests of the oak processionary moth (Eichenprozessionsspinner) using protective suits and suction equipment to prevent the spread of toxic hairs that cause skin irritation and respiratory problems for residents.

Meanwhile, in Karlsruhe, the invasive oak lace bug (Eichen‑Netzwanze) is rapidly spreading after a recent heat wave. The three‑millimetre insects feed on the undersides of oak leaves, causing yellowing, leaf die‑back and increased vulnerability of already stressed trees to drought and disease. Researchers warn that climate change and human transport are accelerating the bug’s expansion across Germany, posing a threat to oak ecosystems and associated food webs.