Abstract
ABSTRACT. Three eclosion rhythms of Diatraea grandiosella Dyar (Lepidoptera, Pyralidae) showed different phase relationships to the LD cycle, different degrees of synchronization and different sensitivity to a brief light perturbation. Egg hatching occurred mainly at dawn, whereas pupation and adult emergence occurred mainly at dusk. The egg hatching was the most synchronized rhythm of the three, pupation the least. The egg hatching rhythm was more sensitive to a brief light perturbation than was the adult emergence rhythm. A light pulse in the middle of the night caused greater disturbance in the egg hatching rhythm than did a pulse placed in the early night. The three rhythms persisted in both DD and LL. LL free‐running rhythm gradually became desynchronized and broke down at the third cycle. The phase relationships reveal difficulties in applying the ‘external coincidence model’ to this species' photoperiodic response.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
