Observations of the flight behaviour of the army worm moth, Spodoptera exempta , at an emergence site using radar and infra‐red optical techniques

ABSTRACT. Studies were made in Kenya of the flight behaviour of African armyworm moths which had emerged from areas previously infested with‘gregarious’caterpillars. The use of radar and an infra‐red optical detector permitted quantitative, direct observations of the flying moths, over all of their flight altitudes, without disturbing their behaviour. Almost all of the successfully emergent moths…