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Egyptian Journal of Biological Pest Control

Table 1 Developmental period (mean ± SE) of Hippodamia convergens fed on two aphid species

From: Life table and demographic parameters of the coccinellid predatory species, Hippodamia convergens Guérin-Méneville (Coleoptera: Coccinellidae) when fed on two aphid species

Life stages

n

A. gossypii

n

L. erysimi

Egg incubation

40

3.15 ± 0.12a

40

2.45 ± 0.08b

L1

38

4.03 ± 0.12a

40

2.55 ± 0.08b

L2

32

5.10 ± 0.14a

36

2.61 ± 0.09b

L3

24

5.50 ± 0.23a

34

2.32 ± 0.07b

L4

23

6.82 ± 0.19a

32

3.81 ± 0.13b

Pupa

23

6.82 ± 0.19a

32

4.47 ± 0.10b

Adult longevity

22

30.6 ± 0.56b

32

36.4 ± 0.50a

  1. SE was estimated by Bootstrapping (100,000 replications), L1–L4 indicate the larval instar, means sharing similar letters in each row are not significantly different at P > 0.05, n = numbers of individual H. convergens that completed a stage
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