The fertilizer calcium cyanamide (CaCN 2 ) is often used due to its sanitary effect in the soil. Among other application areas, it has been described to have a lethal effect on various insect species of different orders. Wireworms of the genus Agriotes spp. (Coleoptera: Elateridae) are severe and widespread agricultural root damaging pests affecting numerous crops and weeds. Previous work on CaCN 2 against wireworms has mainly been limited to identify and evaluate crop protection rates. This paper, however, focuses on the effect of CaCN 2 on wireworms. Therefore, we investigated the mortal and repellent impact of CaCN 2 on late instar larvae of Agriotes ustulatus in soil without plant material under laboratory conditions. Our results indicate a non-toxic, yet repellent, character of CaCN 2 on wireworms. However, these results are not sufficient to conclude that CaCN 2 will work as a wirewormrepellent in the field. Trials including both, a food source and wireworms in feeding state, will be needed for a substantial conclusion. Finally, our findings give evidence that further investigations are reasonable.