Abstract
Overwintering females of Dictyna felis collected on 2-3 December 1990 were reared at 25°C in long (LD-16:8) and short (LD-10:14) photoperiods. In the rearings at 25°C in long photoperiod, oviposition commenced on 18th-29th day from the start and 4-7 egg sacs were produced by 40th-50th day. In the rearings at 25°C in short photoperiod, however, oviposition never occurred until 60th day. The rearings of 1st instar nymphs emerged from egg sacs on 4 June 1991 revealed that development to adulthood was accelerated at 23°C in short photoperiod as compared with that under natural conditions. The number of molts required for development in both rearings was 4-5. However, all the experimental animals reared at 23°C in long photoperiod failed to develop into adults despite of successful development up to subadults. The subadults finally died after survived for 30-100 days from 4th or 5th molt.
