Abstract: Life tables of laboratory population of the Coccinella undecimpunctata L. were constructed at five temperatures. The results showed that the developmental rate increased with the temperature increasing from 16℃ to 32℃. The longest duration of the generation was 64.2 days observed at 16℃, the shortest was 16.4 days at 32℃, and in between 27.1 days and 21.5 days at 24℃ and 28℃, respectively. The threshold temperatures and the effective accumulated temperatures required for egg, larva, pupa and whole generation were 10.9℃, 11.1℃, 12.5℃, 10.6℃ and 40.9, 110.3, 39.7, 359.4 degree-day, respectively. The lifespan was shortened with the temperature increasing. The longest lifespan was 34.7 days at 16℃, while the shortest was 14.1 days at 32℃. The maximum number of eggs laid per female was 463.8 at 24℃, while the least was 96.4 at 32℃. It was so concluded from the results that temperature had great effect on the development of C. undecimpunctata. The most suitable temperature range was from 24℃ to 28℃, during which there were higher innate capacity of increase and the highest index of population trend, and the double population time was shortened. The increase rate of population at 16℃ was limited, with the index of population trends only 10.7% as high as that at 24℃; meanwhile double population time was 23.3 days, which was 4.1 times that at 24℃. The development duration, survival rate and fecundity of C. undecimpunctata was decreased at 32℃.

Key words: Coccinella undecimpunctata, laboratory population, temperature, life table