Abstract
AbstractTo investigate the physiology of Chrysopa pallens, the effect of photoperiod on diapause and development was examined in a Japanese population (33.4°N). The response stage for diapause of C. pallens was considered to be the prepupal stage. The critical photoperiod for diapause induction at 20.0°C was between 13 h light : 11 h dark (LD 13:11) and LD 14:10. The larval developmental period was affected by photoperiod: larvae in diapause took longer to complete their development. This difference of larval developmental period in relation to photoperiod was considered to be an adjustment of larval diapause timing.
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