Effects of ultrasound on drosophila—I killing of eggs exposed to traveling and standing wave fields

Abstract Eggs of the fruit fly, Drosophila melanogaster (wild type), were exposed to 1 MHz traveling and standing wave ultrasound at intensities up to 5 W/cm 2 . Traveling waves at 3 W/cm 2 and “1 W/cm 2 standing waves” killed about one third of the exposed population. Death occurred at the egg stage of development. This study was unable to confirm earlier reports of delayed lethality as a result of exposure to ultrasound in that fraction of the population which survived beyond the egg stage.