Skip to main content

Table 2 Life table parameters (Means ± SE) of different generations of Trichogramma brassicae reared on Sitotroga cerealella eggs in both primary and rejuvenated populations

From: Rejuvenation improves the quality of Trichogramma brassicae Bezdenko (Hymenoptera: Trichogrammatidae) reared for many generations on Sitotroga cerealella (Olivier) (Lepidoptera: Gelechiidae)

Population

Generation

GRR (eggs/individual)

R0 (eggs/individual)

r (d−1)

λ (d−1)

T (d)

Rejuvenated population

31

26.13 ± 3.14a

20.71 ± 2.79a

0.239 ± 0.011a

1.271 ± 0.014a

12.65 ± 0.04a

32

24.11 ± 2.87a

19.95 ± 2.61a

0.237 ± 0.010a

1.267 ± 0.013ab

12.65 ± 0.04a

33

21.90 ± 2.62ab

18.49 ± 2.40ab

0.231 ± 0.010ab

1.260 ± 0.013abc

12.63 ± 0.03a

34

19.62 ± 2.52abc

16.78 ± 2.32ab

0.224 ± 0.011abc

1.251 ± 0.014abc

12.60 ± 0.03a

35

15.82 ± 2.14bcd

13.47 ± 1.95bc

0.208 ± 0.012bcd

1.231 ± 0.014bcd

12.49 ± 0.03b

36

14.88 ± 2.01cde

12.69 ± 1.82bc

0.204 ± 0.012bcde

1.226 ± 0.014cde

12.47 ± 0.03bc

40

13.68 ± 1.71cdef

10.95 ± 1.51cde

0.193 ± 0.011def

1.213 ± 0.014def

12.40 ± 0.03c

45

12.25 ± 1.39def

9.81 ± 1.26cde

0.185 ± 0.011def

1.203 ± 0.013def

12.30 ± 0.02d

Domesticated population

31

12.46 ± 1.43def

9.93 ± 1.27cde

0.186 ± 0.011def

1.204 ± 0.013def

12.31 ± 0.02d

32

12.50 ± 1.40def

9.99 ± 1.26cde

0.186 ± 0.010def

1.205 ± 0.013def

12.31 ± 0.02d

33

12.20 ± 1.35def

9.93 ± 1.23cde

0.186 ± 0.010def

1.204 ± 0.012def

12.31 ± 0.02d

34

12.21 ± 1.37def

9.85 ± 1.25cde

0.185 ± 0.010def

1.204 ± 0.013def

12.30 ± 0.02d

35

11.92 ± 1.36def

9.41 ± 1.20cde

0.182 ± 0.010def

1.199 ± 0.013def

12.30 ± 0.02d

36

11.66 ± 1.35def

9.29 ± 1.20cde

0.181 ± 0.011def

1.198 ± 0.013def

12.30 ± 0.02d

40

10.84 ± 1.26ef

8.78 ± 1.13de

0.176 ± 0.011ef

1.192 ± 0.013ef

12.30 ± 0.02d

45

9.91 ± 1.12f

7.82 ± 1.01e

0.167 ± 0.011f

1.181 ± 0.013f

12.29 ± 0.02d

  1. Means marked with the same letters within the same column (including both rejuvenated and domesticated population) are not significantly different (Paired-bootstrap, α = 0.05)