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Table 3 Life table parameters (mean ± SE) of Aphidius matricariae parasitizing Schizaphis graminum at various temperatures

From: Estimating some demographic parameters of Aphidius matricariae Haliday (Hymenoptera: Braconidae), the parasitoid of the greenbug aphid, Schizaphis graminum (Rondani) (Hemiptera: Aphididae), at different temperatures

Parameters

Temperature (°C)

20

25

30

rm (♀/♀/day)

0.320 ± 0.011a

0.310 ± 0.009a

0.160 ± 0.014b

R0 (♀/♀/generation)

55.306 ± 6.316a

48.890 ± 5.148b

6.167 ± 0.754c

λ (day−1)

1.382 ± 0.014a

1.362 ± 0.013a

1.171 ± 0.017b

T (day)

14.530 ± 0.306a

15.655 ± 0.172a

10.780 ± 0.160b

DT (day)

2.155 ± 0.067a

2.235 ± 0.069a

4.281 ± 0.342b

rw (♀/♀/week)

9.660 ± 0.096a

9.536 ± 0.091a

8.216 ± 0.117b

  1. Means followed by different letter in the same row are significantly different (Tukey’s test, P < 0.05)
  2. rm intrinsic rate of increase, R0 net reproductive rate, λ finite rate of increase, T mean generation time, DT doubling time, rw increase rate in 1 week