Summary
The long-day insectYponomeuta vigintipunctatus was subjected to various combinations of temperature and photoperiod. The photoperiodic induction curve at 10°C resembled the one at 20°C, but with a shift of the critical photoperiod towards the shorter day-length. Such unusual averting of diapause at lower temperatures in combination with intermediate long-day photoperiods has still been described in only few insect species of the temperate zone.
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The author thanks W. M. Herrebout, A. Veerman and M. C. M. de Jong for valuable suggestions and for correcting the manuscript, and J. Herzberg for drawing the figure.
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Kusters, G.J. Photoperiodic diapause induction suppressed at low temperatures in a long-day insect. Experientia 44, 788–789 (1988). https://doi.org/10.1007/BF01959167
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DOI: https://doi.org/10.1007/BF01959167