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Table 1 Daily numbers of Eutetranychus orientalis egg and protonymph consumed by Amblyseius swirskii and Euseius scutalis at varying prey densities (Mean ± SE)

From: Foraging behaviors of Amblyseius swirskii Athias-Henriot and Euseius scutalis (Athias-Henriot) (Acari: Phytoseiidae) feed on the invasive pest, Eutetranychus orientalis (Klein) (Acari: Tetranychidae)

Prey density

Egg

Protonymph

A. swirskii

E. scutalis

p

A. swirskii

E. scutalis

p

1

0.93 ± 0.06*

0.13 ± 0.09

< 0.001

1.00 ± 0.00

0.80 ± 0.10

= 0.073

5

4.22 ± 0.28*

0.80 ± 0.22

< 0.001

4.80 ± 0.10

4.40 ± 0.19

= 0.098

10

7.66 ± 0.47*

1.11 ± 0.21

< 0.001

9.66 ± 0.21*

7.40 ± 0.33

< 0.001

20

13.76 ± 0.65*

1.13 ± 0.19

< 0.001

19.20 ± 0.27*

12.75 ± 0.55

< 0.001

40

23.06 ± 0.74*

1.05 ± 0.21

< 0.001

29.93 ± 1.47*

21.00 ± 0.98

< 0.001

80

23.61 ± 0.68*

1.33 ± 0.25

< 0.001

30.80 ± 0.75*

21.60 ± 0.74

< 0.001

  1. *Significant differences between each pair of prey consumption by A. swirskii and E. scutalis for the same prey densities (Mann–Whitney U test; t test)