Table 2.
Population parameters of Nilaparvata lugens feeding on rice plants amended with Si or not.
| Si treatment (g Si/kg soil) | r m | λ | R 0 | T | DT |
|---|---|---|---|---|---|
| 0 | 0.10 ± 0.0007 a | 1.10 ± 0.0008 a | 35.8 ± 0.43 a | 36.2 ± 0.28 a | 7.0 ± 0.05 a |
| 0.16 | 0.09 ± 0.0003 b | 1.09 ± 0.0003 b | 21.2 ± 0.64 b | 35.7 ± 0.28 ab | 8.1 ± 0.03 b |
| 0.32 | 0.09 ± 0.0018 b | 1.09 ± 0.0020 b | 19.3 ± 0.34 b | 34.2 ± 0.55 b | 8.0 ± 0.16 b |
Data are expressed as mean ± SE. Data in a column followed by different letters are significantly different (Tukey’s multiple range test, P = 0.05). The observation was made to three populations in each treatment. r m, intrinsic rate of increase (eggs per female per d); λ, finite rate of increase (population growth rate per d); R 0, net reproductive rate (eggs per female); T, mean generation time (d); DT, population doubling time (d).