Der Einsatz von Schlupfwespen zur Bekämpfung des Gemeinen Nagekäfers in Kirchen

Ein Forschungsprojekt der Erzdiözese München und Freising

Abstract

The use of parasitic wasps to control the common furniture beetle in churches
A research project of the Archdiocese of Munich and Freising
Acute so-called woodworm infestation in churches can lead to damage to altars, sculptures, and wooden furnishings. This is usually caused by the common furniture beetle (Anobium punctatum). Since 2012, the parasitic wasp species Spathius exarator has been used in Germany as a natural enemy of the pest to combat it. A research project investigates the targeted use of parasitic wasps for pest control. Since 2021, this method has been practised in 15 selected, very different churches in the Archdiocese of Munich and Freising, accompanied by extensive monitoring and verifiably documented. The progress of the ichneumon wasp treatment shows a significant reduction in infestation with the larvae of the common rodent beetle in the reference areas observed. The large-scale project over several years allows a differentiated view of the anobia infestation and its control. However, before the considered and justified release of beneficial insects, each infestation situation must be precisely and expertly assessed and evaluated. In terms of a sustainable and environmentally friendly use of our resources, it was shown that the targeted use of parasitic wasps is an effective method of wood pest control and contributes to the preservation of the works of art in churches.