Influences of temperature on the development and life table parameters of a laboratory population of Celypha flavipalpana Herrich-Schaffer (Lepidoptera:Tortricidae)
Author of the article:WANG Miao** WANG Xiao-Qi***
Author's Workplace：College of Plant Protection, Shenyang Agricultural University, Shenyang 110866, China
Key Words：Celypha flavipalpana, developmental duration, threshold of development, effective accumulated temperature, life table, fecundity
Abstract： [Objectives] To study the influences of temperature on the population dynamics and fecundity of a laboratory population of Celypha flavipalpana Herrich-Schaffer. [Methods] The developmental threshold and effective accumulated temperature at different temperatures （20-32℃，16L︰8D，RH=70%） were measured and data collected at 26℃ was used to compile age specific life and fecundity tables. [Results] The development threshold and effective accumulated temperature of each life-history stage, and one complete generation, were (14.30±2.43)、(6.45±1.57)、(11.01±1.78)、(12.40±2.7)、(9.48±2.19) ℃ and (45.05±8.88)、(492.01±42.48)、(107.53±13.63)、(65.51±12.39)、(671.86±94.19) degree·days, respectively. The index of population trend was 12.13, the net reproductive rate was 15.85, the mean generation time was 39.99 d, the intrinsic rate of natural increase was 0.0691, the finite rate of increase was 1.0715, and the doubling time was 10.0331. [Conclusion] The developmental duration of each instar decreased with increasing temperature from 20℃ to 28℃, whereas the developmental rate of larvae and pupae declined at 32℃ and a proportion of larvae appeared to become dormant. The experimental population tended to increase when kept at 26℃.