Expert suggests Funen export controls to curb oak processionary moth spread

A ban on moving oak trees off the island of Funen could slow the spread of the oak processionary moth, though it would severely impact local nurseries, according to a Danish expert speaking on DR’s P1 Morgen.

Mathias Just Justesen, an assistant professor at the University of Copenhagen’s Department of Geoscience and Natural Resource Management, proposed stricter monitoring of oak tree exports from Funen to other regions, requiring certification that shipments are free of the pest. Trees failing inspection would be barred from export.

Just Justesen acknowledged the measure would hit Funen’s nurseries hard but argued it was a necessary step to prevent the moth’s spread across Denmark.

Conservative MP Mai Mercado, representing Funen, called such a ban a “last resort,” stressing it would strip nurseries of their livelihood. She urged Odense Municipality to intensify eradication efforts instead, suggesting round-the-clock crews to remove nests.

Odense has already closed a daycare and restricted access to some paths due to the moth’s allergenic larvae. Current control methods include vacuuming, hot foam treatments, and traps, but officials admit full eradication is unlikely, citing both domestic and international experience.

Michael Wognsen Frederiksen, director of Odense’s Climate and Environment Administration, confirmed the municipality is focusing its efforts in high-traffic areas with heavy infestations.