Abstract
Abstract Photoperiodic sensitivity for diapause induction of the green lacewing, Chrysoperla sinica (Tjeder) was examined at 22°C. The adult diapause of C. sinica was induced by short‐day photoperiods, and the critical photoperiod for its induction was between 12.5L‐11.5D and 13L‐11D.Adults developed without diapause under long‐day conditions, and entered diapause under short‐day conditions. The adult stage was the uppermost sensitive stage for adult diapause induction, adults could go into diapause only when the emerging adults were under diapause‐inducing short‐day photoperiods. The short‐day photoperiodic experience by transferring between 15L: 9D and 9L: 15D at preimaginal stages did not result in adult diapause under 15L: 9D photo regime, although some treatments extended the pre‐oviposition period in adult stage. The results showed that the 3rd instar larvae and pre‐pupae were more sensitive to the photoperiodic change from 15L: 9D to 9L: 15D photo regime than the other preimaginal stages.
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