AbstractHabituation (accepting food sources previously rejected) and cross‐habituation (accepting food sources containing deterrents after exposure to unrelated deterrents) induced by dietary experience are observed in lepidopteran larvae, but the physiological mechanisms underlying these phenomena are poorly understood. In this study, behavioural and electrophysiological responsiveness to three unrelated deterrents were investigated in larvae of Agrotis ipsilon (Hufnagel) (Lepidoptera: Noctuidae). Caterpillars were fed with one of four diets:...