Natural dispersal of Spodoptera litura
In Japan, experiments were conducted to measure the dispersal distance of male Spodoptera litura (EPPO Al quarantine pest).
It was found out that the mean flight distance during the first night after the release was 3.5 - 5.9 km while the flight distance during the whole experiment averaged 3 - 10.9 km.
Sources
Wakamura, S.; Kozai, S.; Kegasawa, K.; Inoue, H. (1990) Population dynamics of adult Spodoptera litura (Fabricius) (Lepidoptera: Noctuidae): dispersal distance of male moths and its seasonal change.
Applied Entomology and Zoology 25, 447-456