Stable isotopes and elements as biological markers to determine food resource use pattern by Lasioderma serricorne (Coleoptera: Anobiidae)

► Lasioderma serricorne disperse between different landscapes and feed on different hosts. ► Stable isotopes and elements in body tissue are used as biological markers to determine larval food. ► Distinct differences shown in carbon isotope values for insects raised on C3- or C4-based hosts. ► Mn is a useful biological marker to indicate L. serricorne feeding origins.