From: Hydrogel as an alternative to agar for laboratory rearing of the green peach aphid Myzus persicae
Population parameter | 15 °C | 20 °C | ||||||
---|---|---|---|---|---|---|---|---|
Agar | Hydrogel | Agar | Hydrogel | |||||
B. oleraceae | N. physalodes | B. oleraceae | N. physalodes | B. oleraceae | N. physalodes | B. oleraceae | N. physalodes | |
Mean ± SE | Mean ± SE | Mean ± SE | Mean ± SE | Mean ± SE | Mean ± SE | Mean ± SE | Mean ± SE | |
Intrinsic rate of increase, r (day−1) | 0.15 ± 0.01 d | 0.12 ± 0.01 e | 0.20 ± 0.01 b | 0.16 ± 0.01 d | 0.15 ± 0.02 cde | 0.19 ± 0.01 bc | 0.29 ± 0.01 a | 0.28 ± 0.01 a |
Finite rate of increase, λ (day−1) | 1.16 ± 0.01 c | 1.12 ± 0.01 d | 1.22 ± 0.01 b | 1.17 ± 0.01 c | 1.16 ± 0.02 cd | 1.21 ± 0.01 bc | 1.34 ± 0.01 a | 1.33 ± 0.01 a |
Gross reproductive rate (offspring per individual), GRR | 40.39 ± 2.94 b | 22.35 ± 3.24 bc | 46.02 ± 2.81 b | 47.65 ± 3.15 b | 22.73 ± 5.67 c | 32.47 ± 6.15 c | 57.46 ± 3.17 a | 64.28 ± 2.96 a |
Net reproductive rate (offspring per individual), R0 | 17.14 ± 2.60 b | 8.28 ± 1.56 cd | 28.89 ± 2.50 ab | 23.40 ± 3.06 b | 5.68 ± 1.27 d | 9.97 ± 1.48 c | 33.5 ± 2.92 a | 36.46 ± 3.56 a |
The mean length of a generation, T (days) | 18.62 ± 0.31 a | 17.54 ± 0.45 b | 16.77 ± 0.33 b | 19.53 ± 0.40 a | 11.12 ± 0.25 d | 11.89 ± 0.32 cde | 11.87 ± 0.15 e | 12.42 ± 0.21 c |