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Table 2 Mean (± SE) pre-oviposition, oviposition periods and longevity, mean number (± SE) of total and daily eggs laid per female, total and daily number (± SE) of prey consumed per female for Neoseiulus barkeri fed solely on Tetranychus urticae (T.u.) or larval Neoseiulus californicus (N.c.), Amblyseius swirskii (A.S.) or on a combination of T. urticae, and larval phytoseiid

From: Intraguild predation in three generalist predatory mites of the family Phytoseiidae (Acari: Phytoseiidae)

Prey and number Periods Eggs laid per female Consumption rates Ratio of T. u.: predator larvae consumed
Pre-oviposition Oviposition Longevity Total eggs Daily eggs Total consumption Daily consumption
T.u. Phytoseiid larvae T.u. Phytoseiid larvae
20 T.u. 1.50 ± 0.10 b 26.50 ± 0.23 a 30.50 ± 0.28 a 36.00 ± 0.28 a 1.36 ± 0.01 a 478.33 ± 3.65 a   15.69 ± 0.04 a   
20 N.c. 1.67 ± 0.10 ab 18.50 ± 0.23 c 22.42 ± 0.29 c 16.00 ± 0.19 bc 0.87 ± 0.01 c   214.67 ± 4.18 b   9.77 ± 0.05 a  
20 A.s. 1.50 ± 0.10 b 21.75 ± 0.19 b 25.58 ± 0.22 b 16.75 ± 0.21 b 0.77 ± 0.01 d   248.58 ± 2.20 a   9.72 ± 0.03 a  
10 T.u. + 10 N.c. 1.58 ± 0.10 b 16.25 ± 0.19 e 19.67 ± 0.25 e 10.75 ± 0.19 e 0.66 ± 0.02 e 97.31 ± 0.77 e 101.58 ± 1.06 e 4.96 ± 0.05 e 5.18 ± 0.08 d 0.96:1
10 T.u. + 10A.s. 2.00 ± 0.00 a 15.92 ± 0.18 e 20.17 ± 0.22 e 10.67 ± 0.25 e 0.67 ± 0.02 e 113.71 ± 1.37 d 61.50 ± 0.96 f 5.65 ± 0.07 d 3.05 ± 0.02 e 1.85:1
20 T.u. + 20 N.c. 1.75 ± 0.09 ab 16.42 ± 0.23 e 20.50 ± 0.26 de 15.00 ± 0.17 d 0.92 ± 0.01 b 169.08 ± 2.47 c 188.42 ± 2.70 c 8.25 ± 0.07 c 9.19 ± 0.03 b 0.90:1
20 T.u. + 20A.s. 1.58 ± 0.10 b 17.33 ± 0.25 d 21.50 ± 0.29 cd 15.58 ± 0.23 cd 0.90 ± 0.01 bc 234.52 ± 1.66 b 159.08 ± 2.21 d 10.94 ± 0.11 b 7.40 ± 0.02 c 1.48:1
F 3.59 320.47 226.45 1529.19 525.34 7782.66 1512.10 9108.09 8081.34 3999.77
P 0.002 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000
  1. Where applicable, the ratio of T. urticae to larval phytoseiids consumed by adult females is given. Values in each column followed by the same letter are not significantly different (P > 0.05) when Neoseiulus barkeri fed on 20 T. urticae/phytoseiid larvae are compared to their other four prey combinations