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Table 3 Parasitism 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

c0 (hosts/parasitoid)

Qp

ψ (host/parasitoid)

ω (hosts/parasitoid/day)

Rejuvenated population

31

20.71 ± 2.79a

≈ 1

0.279 ± 0.017a

0.355 ± 0.025a

32

19.95 ± 2.61a

≈ 1

0.275 ± 0.016a

0.349 ± 0.024a

33

18.49 ± 2.40ab

≈ 1

0.269 ± 0.016a

0.339 ± 0.023a

34

16.78 ± 2.32ab

≈ 1

0.261 ± 0.016ab

0.326 ± 0.024ab

35

13.47 ± 1.95bc

≈ 1

0.243 ± 0.016bc

0.300 ± 0.024bc

36

12.69 ± 1.82bc

≈ 1

0.239 ± 0.016bcd

0.293 ± 0.023bcd

40

10.95 ± 1.51cde

≈ 1

0.227 ± 0.015bcd

0.275 ± 0.021bcd

45

9.81 ± 1.26cde

≈ 1

0.220 ± 0.013bcd

0.265 ± 0.019cd

Domesticated population

31

9.93 ± 1.27cde

≈ 1

0.220 ± 0.013bcd

0.265 ± 0.019bcd

32

9.99 ± 1.26cde

≈ 1

0.221 ± 0.013bcd

0.266 ± 0.019bcd

33

9.93 ± 1.23cde

≈ 1

0.220 ± 0.013bcd

0.265 ± 0.019cd

34

9.85 ± 1.25cde

≈ 1

0.220 ± 0.013bcd

0.264 ± 0.019cd

35

9.41 ± 1.20cde

≈ 1

0.216 ± 0.013cd

0.259 ± 0.019cd

36

9.29 ± 1.20cde

≈ 1

0.215 ± 0.013cd

0.258 ± 0.019cd

40

8.78 ± 1.13de

≈ 1

0.211 ± 0.013cd

0.251 ± 0.019cd

45

7.82 ± 1.01e

≈ 1

0.202 ± 0.012d

0.238 ± 0.017d

  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)