The female moth lays her eggs within the flower buds of their host plant. When the larvae emerge from their eggs, they eat into the leaves or buds of their host, hiding from predators. Once they are large enough, they emerge to feed from the fresh growth of the plant. N. isomoera pupate in a loose cocoonon the ground under their host. N. isomoera are day-flying moths. They are low but fast flyers and constantly vibrate their wings to enable them to take off rapidly.