none This research was conducted in greenhouse at the National Corn and Sorghum Research Center of EMBRAPA in Sete Lagoas, MG, Brazil. It aimed to study the general behavior of Spodoptera frugiperda larvae attacked by the egg-larval parasitoid. Chelonus insularis. Fourteen parasitized and fourteen non-parasitized 3 days old host larvae evaluated using a visual scale from zero to five. On the 6 th observation day plant lesions could began to be detected visually. All larvae showed preference to the com leaf, regardless of being parasitized. Healthy larvae presented high mobility and caused higher damage on the plants than parasitized larvae which pupate earlier.