Pheromonotropin (Pseudaletia separata) (Pss-PT), a C-terminal pentapeptide FXPRL-amide pheromone of the armyworm (Pseudaletia separata), is a member of the PK/PBAN family. It induces sex pheromone production in moths while also mediating feeding through intestinal muscle contraction, influencing development processes such as embryonic diapause, pupal diapause, and pupation, and enhancing defense mechanisms against predators [1].