Biotic potential, fertility and life table ofSpodoptera albula (Walker) (Lepidoptera: Noctuidae), under controlled conditions

Anais da Academia Brasileira de Ciências

DÉbora G. Montezano¹  Alexandre Specht¹  Daniel R. Sosa-gÓmez¹  VÂnia F. Roque-specht¹  Tarciso M. Bortolin¹  Edegar Fronza¹  PatrÍcia Pezzi¹  Priscila C. Luz¹  Neiva M. Barros¹ 

关键词: armyworm;    development;    fecundity;    reproduction;    spermatophore;    lagarta-militar;    desenvolvimento;    fecundidade;    reprodução espermatóforo;   

DOI  :  10.1590/0001-3765201402812

来源: SciELO

【 摘 要 】

This study aimed to evaluate the biotic potential, life table parameters and fertility of Spodoptera albula (Walker, 1857) under controlled conditions (25 ± 1°C, 70 ± 10% RH and 14 hour photo phase). The longevity, pre, post and oviposition periods, fecundity and fertility of 13 couples were evaluated. The longevity of females (13.500 days) was significantly higher than those of males (11.154 days). The mean durations of the pre, post and oviposition periods were 2.615, 1.769 and 9.385 days, respectively. The mean fecundity was 1.417.69 eggs and mean fertility was 1.340.401 larvae, per female. On average, females copulated 1, 231 times. A strong positive correlation was observed between the number of copulations and fecundity (r = 0.847, p <0.001), as well as a strong negative correlation between the number of copulations and the duration of the pre-oviposition period (r = -0.762, p = 0.002), and longevity (r = -0.788, p = 0.001). The biotic potential of S. albula was estimated at 8.768 x 1022 individuals / female / year. The net reproductive rate (Ro) was 353,904 times per generation and the mean generation time (T) was 37.187 days. The intrinsic rate of increase (rm) was 1,105, with a finite rate of increase (λ) of 3,019.

【 授权许可】

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