Related Experiment Video
Updated: Jul 12, 2026

07:14
Light Preference Assay to Study Innate and Circadian Regulated Photobehavior in Drosophila Larvae
Published on: April 20, 2013
Insect photoperiodism: the "T experiment" as evidence for an hourglass mechanism
Abstract:
"T experiments" demonstrate that the clock controlling termination of larval diapause in Ostrinia nubilalis is an hourglass mechanism that measures 8 hours of darkness. Circadian oscillations are not involved in photoperiodic time measurement in this species.

