抄録
A Sumatran phtophagous lady beetle, Epilachna enneasticta was reared under laboratory conditions in order to study its survivor ship and fertility schedules. E. enneasticta required 28.7 days for development of the immature stages. The mean longevity of males (90.4 days) was longer than that of females (71.4 days). The mean length of the pre-reproductive period (30.1 days) was longer than that of the post-reproductive period (2.4 days). Females laid eggs continuously at a rather constant rate throughout their reproductive period and the average number of eggs produced per female was 425.4. the intrinsic rate of natural increase r was 0.070 per capita per day. E. enneasticta showed half to two-thirds of the mean fecundity, twice the pre-reproductive period, and a lower intrinsic rate of natural increase than three of its sympatric species in Sumatra (E. vigintioctopunctata, E. septima, and E. dodecastigma).
