ABSTRACT Red onion (Allium cepa L.) is an important horticultural commodity with high economic value in Indonesia. One of the obstacles in red onion cultivation is pest infestation, namely the onion armyworm (Spodoptera exigua Hubner). The use of the earwig predator (Euborellia annulata Fabricus) can be an alternative for natural control of S. exigua. This study aimed to determine the pred…