关键词: 仓储害虫, 咖啡豆象, 实验种群, 发育, 繁殖, 温度

Abstract: To research the influence of temperature on development and reproduction of experimental populations of Araecerus fasciculatus, and explore the relationship between the ecological factor and life character and then provide some basic data for the control of pest, the development and reproduction of A. fasciculatus were studied at 17, 20, 23, 26, 29 and 32℃ under controlled conditions in the laboratory. The mathematical equations describing the relationship between development and temperature were fitted with line regression, Logistic model and “Wang-Lan-Ding” model, respectively. The threshold temperature and effective accumulated temperature were calculated using the least-squares method. The results showed that the developmental rate of larva increased with increasing of temperature between 17 to 29℃, and then decreased somewhat at 32℃. The highest developmental rate (0.493 d^-1) appeared at the temperature of 27.43℃. For egg, larva, pupa and egg-pupa, the threshold temperatures were 9.60, 11.48, 7.60 and 10.55℃, respectively, and the effective accumulated temperatures were 135.51, 523.57, 157.09 and 828.63 day-degrees, respectively. The influence of temperature on the development and reproduction of experimental populations of A. fasciculatus is remarkable. It is inferred that the lower threshold temperatures and lower effective accumulated temperatures are among the main reasons that the pest may cause great harm. The mathematical equations describing the relationship between development and temperature can be used to predict the occurrence of the pest and provide a theoretical basis for its integrated management.

Key words: Stored product pest, Araecerus fasciculatus, experimental population, development, reproduction, temperature