Delay and acceleration of breaking diapause of Antheraea pernyi and Laspeyresia pomonella by photoperiod manipulation

Hayes, D. K.; Sullivan, W. N.; Cawley, B. M.; Oliver, M. Z.; Schechter, M. S.

doi:10.1016/0024-3205(70)90210-9

Cited by 8 publications

(1 citation statement)

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“…The first study was carried out by Hayes et al (1970) on the oak silkworm Antheraea pernyi and the codling moth Laspeyresia pomonella. However, no clear effects of light pulses were observed.…”

Section: Length Of Photophase (H)mentioning

confidence: 99%

Photoperiodic clock of diapause termination in Pseudopidorus fasciata (Lepidoptera: Zygaenidae)

Li¹,

Xue²,

Hua³

et al. 2003

Eur. J. Entomol.

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Abstract. Photoperiodic control of diapause termination was systematically investigated in Pseudopidorus fasciata. In 24 h lightdark cycles, the rate of diapause termination in this species depended on photoperiod. The critical night length (CNL) for diapause termination was 10 h, 0.5 h shorter than that for diapause induction. Night-interruption experiments with T = 24 showed that dia pause was effectively terminated when the scotophases separated by light pulse were shorter than the critical night length (10 h); no developing individuals were found if the duration of the pre-interruption scotophase or the post-interruption scotophase exceeded the CNL. A 15-min light pulse was sufficient to reverse the effect of long night when it was placed 8 h after lights-off. Resonance experiments with a constant photophase of 12 h or 16 h and various scotophases of 4-80 h showed an hourglass-type photoperiodic response, where no rhythmicity was found. In another resonance experiment with constant scotophase of 8 h and various photo phases of 4-72 h, all individuals developed into cocoons. In the Bunsow experiment, the response curve showed two apparent peaks for diapause termination, one being 8 h after lights-off, and another 8 h before lights-on. However, there was no periodic rhythmicity, which again indicates an hourglass principle. The results lead to the conclusion that the same photoperiodic clock mechanism (a long-night measuring hourglass) is involved in both diapause induction and termination.

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Section: Length Of Photophase (H)mentioning

confidence: 99%