Emergence of populations of the oak processionary moth
In the next few weeks, the larvae of the oak processionary moth (OPM, known in German as "Eichenprozessionsspinner") will be developing into caterpillars. At this stage of their metamorphosis from larva to adult moth, this species is particularly hazardous to human and animal health.
Living exclusively on oak trees, the oak processionary can appear in parks and forests. The City therefore recommends that walkers and visitors to its forests, parks and playgrounds should be vigilant, to prevent any danger to health.
The oak processionary moth can cause serious damage to trees by completely stripping them of their leaves, and the dangers they pose to human and animal health and hygiene cannot be underestimated. The caterpillars are covered with thousands of hollow bristles with barbs that can break off and become airborne, travelling long distances, especially in hot, dry weather. These barbs can penetrate human and animal skin, causing inflammation and/or itching.
As a precautionary measure, the City will be posting warning signs. Please stay away from the affected trees and do not touch the caterpillar nests, the caterpillars themselves, their moulted skins or any infested trees. The Service Forêts (Forestry Department) and Service Parcs (Parks Department) will be removing the caterpillar nests from the trees shortly.
