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Table 1 Mean (± SE) duration of different life stages (day) and fecundity (eggs ± SE) in different generations of the primary and rejuvenated populations of Trichogramma brassicae on Sitotroga cerealella eggs

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

Population

Generation

Number of individuals

Adult longevity (Female)

Adult longevity (Male)

Total life span (day)

Oviposition days

Fecundity

Rejuvenated population

31

76

5.2 ± 0.4a

5.5 ± 0.3a*

15.5 ± 0.3a*

3.8 ± 0.2a**

38.4 ± 3.2a**

32

74

5.0 ± 0.3ab

5.3 ± 0.3ab*

15.5 ± 0.3a*

3.7 ± 0.2a**

35.1 ± 2.9ab**

33

75

4.8 ± 0.3ab

5.0 ± 0.3ab

15.3 ± 0.3ab*

3.6 ± 0.2ab**

33.0 ± 2.7abc**

34

72

4.6 ± 0.3ab

4.8 ± 0.3ab

15.2 ± 0.2ab

3.5 ± 0.2abc*

31.0 ± 2.7abcd**

35

73

4.2 ± 0.3ab

4.7 ± 0.3ab

15.0 ± 0.2ab

3.1 ± 0.2abcd

25.9 ± 2.4bcde**

36

74

4.1 ± 0.3ab

4.4 ± 0.2ab

14.8 ± 0.2ab

3.1 ± 0.2abcd

24.7 ± 2.2cdef**

40

77

4.9 ± 0.3ab**

4.6 ± 0.2ab

14.9 ± 0.3ab

3.2 ± 0.2abcd

22.2 ± 1.7efgh**

45

75

4.4 ± 0.2ab*

4.4 ± 0.3ab

14.6 ± 0.2ab

2.8 ± 0.1bcd

17.9 ± 1.3fgh**

Domesticated population

31

74

4.6 ± 1.5ab

4.5 ± 0.3ab

14.7 ± 0.2ab

2.9 ± 0.1bcd

18.8 ± 1.3fgh

32

75

4.5 ± 1.5ab

4.4 ± 0.3ab

14.6 ± 0.2ab

2.8 ± 0.1bcd

18.3 ± 1.3fgh

33

76

4.4 ± 1.5ab

4.2 ± 0.2ab

14.6 ± 0.2ab

2.9 ± 0.1bcd

18.0 ± 1.3fgh

34

74

4.4 ± 1.5ab

4.3 ± 0.2ab

14.6 ± 0.2ab

2.8 ± 0.1bcd

17.8 ± 1.3fgh

35

77

4.4 ± 1.5ab

4.1 ± 0.2b

14.4 ± 0.2ab

2.8 ± 0.1bcd

17.6 ± 1.3fgh

36

75

4.4 ± 1.5ab

4.2 ± 0.2ab

14.5 ± 0.2ab

2.8 ± 0.1bcd

17.4 ± 1.3fgh

40

76

4.0 ± 1.3ab

4.0 ± 0.2b

14.3 ± 0.2ab

2.7 ± 0.1cd

15.9 ± 1.3gh

45

75

3.7 ± 1.4b

4.1 ± 0.2b

14.1 ± 0.2b

2.5 ± 0.1d

13.3 ± 1.1h

F

 

2.143

2.516

2.673

5.310

15.795

df1,df2

 

15,633

15,343

15,1182

11,577

15,633

P

 

0.007

0.002

 < 0.001

 < 0.001

 < 0.001

  1. The means followed by the same letter in each column (including both rejuvenated and domesticated population) are not significantly different (P > 0.05, Tukey’s test). The means with one or twoasterisk in the respective generations are different according to independent sample t tests at α = 0.05 and 0.01, respectively