Odense Municipality has undertaken a comprehensive effort to control oak processionary moths, also known as “the hell larva,” in southeastern Odense, treating approximately 1200 trees with a bacterial substance. This action follows the discovery of numerous moth nests earlier this year.

The initiative aims to mitigate the risks posed by these moths, which have microscopic hairs that can cause allergic reactions and rashes in humans and animals. City and Culture Councilor Søren Windell expressed his satisfaction with the progress, stating that the majority of affected trees have now been treated.

The initial discovery of up to 1000 nests occurred in January, in the vicinity of the light rail near Bilka, Ikea, and Rosengårdcenteret. These nests were promptly removed. However, to address the possibility of remaining larvae, the municipality decided to implement further control measures using a bacterial substance.

The municipality has assured the public that the pesticide used is environmentally safe and degrades quickly in nature. It poses no harm to other animals, plants, trees, or people.

Initially, Rentokil Skadedyrskontrol (Pest Control) was responsible for spraying the bacterial substance on the oak trees. Currently, Sparvath, a landscaping company, has taken over the task. Sparvath is inspecting the trees and employing methods such as boiling water and foam to combat the larvae as they descend the trunks.

The ongoing effort has revealed that multiple larval stages can coexist on a single tree. This necessitates the use of various control methods simultaneously to effectively manage the infestation.

This is the first recorded instance of oak processionary moth nests in Denmark. The larva, commonly found in countries south of Denmark, is believed to have been introduced through imported oak trees.