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

Egyptian Journal of Biological Pest Control

Table 4 Number of eggs laid by Amblyseius swirskii and Euseius scutalis at different prey densities (Mean ± SH)

Prey density	Prey E. orientalis (Egg)			Prey E. orientalis (Protonymph)
Prey density	A. swirskii (no. of laid eggs)	E. scutalis’in (no. of laid eggs)	p	A. swirskii (no. of laid eggs)	E. scutalis (no. of laid eggs)	p
1	0.66 ± 0.12*	0.20 ± 0.10	0.011	0.53 ± 0.13	0.86 ± 0.19	0.214
5	0.66 ± 0.12	0.33 ± 0.14	0.099	0.73 ± 0.18	1.13 ± 0.19	0.140
10	0.80 ± 0.13	0.72 ± 0.13	0.658	0.86 ± 0.16	1.20 ± 0.14	0.140
20	1.04 ± 0.12	0.73 ± 0.15	0.658	1.06 ± 0.15	1.31 ± 0.11	0.238
40	1.18 ± 0.13	0.76 ± 0.16	0.055	1.26 ± 0.15	1.40 ± 0.13	0.562
80	1.16 ± 0.12*	0.73 ± 0.15	0.034	1.20 ± 0.15	1.40 ± 0.13	0.337

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