Table 2 The effects of R. insecticola on the intrinsic rate of increase r, the net reproductive rate R0, the mean generation times T, and the finite rate of increase λ of the studied S. avenae clones (Linyi-1, Linyi-2, Neixiang-1, Neixiang-2, Linyi-NA and Neixiang-NA) (Mean ± SE).

From: Ecological impact of a secondary bacterial symbiont on the clones of Sitobion avenae (Fabricius) (Hemiptera: Aphididae)

Clones

Genotype

R. insecticola donor

Population parameter (Mean ± SE)

Intrinsic rate of increase r (d−1)

Net reproductive rate R0(offspring/aphid)

Mean generation times T (d)

Finite rate of increase λ (d−1)

Linyi-1

Linyi

Yangpingguan 1

0.24 ± 0.003 b

38.04 ± 1.333 a

14.97 ± 0.287 a

1.28 ± 0.004 b

Linyi-2

Linyi

Yangpingguan 2

0.28 ± 0.010 b

42.50 ± 0.896 a

13.64 ± 0.472 a

1.32 ± 0.013 b

Linyi-NA

Linyi

control

0.30 ± 0.003 a

39.14 ± 2.622 a

12.06 ± 0.260 b

1.36 ± 0.004 a

Neixiang-1

Neixiang

Yangpingguan 1

0.26 ± 0.009 b

38.20 ± 0.636 a

13.91 ± 0.430 a

1.30 ± 0.012 b

Neixiang-2

Neixiang

Yangpingguan 2

0.26 ± 0.007 b

34.43 ± 0.667 a

13.66 ± 0.340 a

1.30 ± 0.009 b

Neixiang-NA

Neixiang

control

0.31 ± 0.000 a

47.89 ± 1.234 a

12.33 ± 0.084 b

1.37 ± 0.000 a

  1. Different letters (a, b) within a column indicate statistically significant differences (P < 0.05; Tukey’s test was used for mean separation).
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