ABSTRACT Shallot (Allium ascalonicum L.) is one of the leading horticultural crops that is highly favored by the public as a cooking spice and is also useful as a traditional medicine. Efforts to increase shallot production still face obstacles, such as pest attacks by the onion caterpillar (Spodoptera exigua Hubner), which can cause yield losses of 32–42%. One of the control strategies …