Stage-structured Population Growth of Helicoverpa armigera (Hübner) (Lepidoptera: Noctuidae): A Simulation Approach

利用玉米穗蟲Helicoverpa armigera（Hübner）的齡期結構進行族群模擬

陳樂(Ratna K. Jha) ； 齊心(Hsin Chi) ； 唐立正(Li-Cheng Tang)

《台灣昆蟲》 32卷2期 (2012/06) Pp. 139-153

https://doi.org/10.6661/TESFE.2012009

摘要

The growth of a stage-structured population of H. armigera was simulated for four variable conditions. Age-stage specific growth rate, and fecundity obtained from an age-stage, two-sex life table analysis were used to project the population growth for 60 days, starting with an average pair of young adults representing the population. Because the survival rate and fecundity used for the population projection were collected from the whole population, initializing the simulation with a pair of average individuals is appropriate. The projection results obtained by using the total number of eggs and the number of eggs that hatched were compared. The population projection obtained by using the total number of eggs provided an erroneous projection of the population growth. The population growth increased the shorter the life cycle, in the following order: artificial diet at 29°C ＞ artificial diet at 25°C ＞ hybrid sweet corn ＞ asparagus. The number of cumulative insect-days and weighted insect-days were also calculated. This study demonstrated the advantages of a computer simulation based on the age-stage, two-sex life table in revealing stage-structured population growth. This knowledge is critical for the timing of integrated pest management.

關鍵字

生命表 ； 每天的昆蟲量 ； 加權昆蟲量 ； 模擬

並列摘要

The growth of a stage-structured population of H. armigera was simulated for four variable conditions. Age-stage specific growth rate, and fecundity obtained from an age-stage, two-sex life table analysis were used to project the population growth for 60 days, starting with an average pair of young adults representing the population. Because the survival rate and fecundity used for the population projection were collected from the whole population, initializing the simulation with a pair of average individuals is appropriate. The projection results obtained by using the total number of eggs and the number of eggs that hatched were compared. The population projection obtained by using the total number of eggs provided an erroneous projection of the population growth. The population growth increased the shorter the life cycle, in the following order: artificial diet at 29°C ＞ artificial diet at 25°C ＞ hybrid sweet corn ＞ asparagus. The number of cumulative insect-days and weighted insect-days were also calculated. This study demonstrated the advantages of a computer simulation based on the age-stage, two-sex life table in revealing stage-structured population growth. This knowledge is critical for the timing of integrated pest management.

並列關鍵字

life table ； insect-days ； weighted stage size ； simulation