Oak processionary moth spreads to new areas on Funen

The invasive oak processionary moth, known for causing painful rashes, has now been detected in Munkebo after previously being found in Odense, reports Danish broadcaster DR.

The caterpillar, often called the “larva from hell,” was first discovered in Odense in autumn 2024. Since then, the municipality has removed 2,500 nests and spent two million kroner in an attempt to eradicate it. Despite these efforts, the pest has continued to spread.

Kerteminde Municipality has surveyed local oak trees and found an abandoned nest in Munkebo. Asbjørn Nyholt, operations manager for Park & Road in Kerteminde, expects more sightings this year.

“Eggs have been laid in the trees, so we’re waiting to find the new generation in the area,” he said.

Last year, seven nests were found in Kerteminde Municipality. Nyholt stressed the need for caution, as the caterpillar’s irritating hairs can trigger severe allergic reactions in sensitive individuals.

“We have to take this extremely seriously. If you’re prone to allergies and inhale these hairs, it can cause a serious reaction,” he warned.

The municipality plans to install warning signs about the toxic larvae. Local resident Kaj Hawaleschka, who walks his dog in the affected forest, said he will keep his pet on a leash and remain vigilant.

“I’ll only avoid the woods if it gets worse,” he said.

Both Odense and Kerteminde municipalities urge the public to report sightings of the oak processionary moth but warn against attempting to remove nests themselves.

Safety advice

Authorities recommend avoiding contact with the caterpillars—both live and dead—as well as their nests and surrounding areas. Exposure to their hairs can cause severe itching and rashes. If contact occurs, rinse and wash the affected skin thoroughly, and wash clothing at 60°C. Seek medical help for severe symptoms.

Pets, including dogs, cats, and horses, are also at risk and may experience similar reactions.