International Journal of Acarology (2016) 42, 70-78

Bahador Maleknia, Yaghoub Fathipour and Mahmoud Soufbaf (2016)
How greenhouse cucumber cultivars affect population growth and two-sex life table parameters of Tetranychus urticae (Acari: Tetranychidae)
International Journal of Acarology 42 (2), 70-78
Abstract: The effect of 12 greenhouse cucumber cultivars (Royal, Amitral, Ariya, Sultan, Vida, Bahman, Storm, Nasim, Negin, PS-29, Tornado and Caspian) on life history and demographic parameters of the two-spotted spider mite (TSSM) (Tetranychus urticae Koch) was determined under laboratory conditions at 25 ± 1ºC, 60 ± 5% RH and a photoperiod of 16:8 (L:8) hours using age-stage, two-sex life table procedure. The longest development time was 8.28 ± 0.09 days on Caspian and the shortest period was obtained on Vida and PS-29 (5.45 ± 0.12 and 5.54 ± 0.07 days, respectively). The TSSM fecundity varied from 64.83 ± 5.33 to 98.38 ± 5.65 eggs per female, which was minimum on Negin and maximum on Amitral. The shortest female longevity was observed on Negin (16.08 ± 1.15 days) and the longest on Amitral (26.82 ± 1.36 days). The net reproductive rate (R₀) varied from 42.30 ± 4.90 on Negin to 75.72 ± 6.64 eggs per individual on Amitral. The lowest value of the intrinsic rate of increase (r) and finite rate of increase (lambda) was on Caspian (0.249 ± 0.006 and 1.282 ± 0.008 day^-1, respectively) and the highest was on Vida (0.331 ± 0.010 and 1.389 ± 0.014 day^-1, respectively). The mean generation time (T) on different cultivars varied from 11.68 ± 0.170 to 16.71 ± 0.266 days. The comparison of demographic parameters of TSSM on 12 greenhouse cucumber cultivars suggested that Vida was the most susceptible and Caspian was the most resistant cultivar to TSSM among the cucumber cultivars tested. Our results could provide implications towards integrated management of TSSM considering its performance on different crop cultivars in terms of population growth potentials.
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Link to article at publishers website
Database assignments for author(s): Yaghoub Fathipour

Research topic(s) for pests/diseases/weeds:
resistance/tolerance/defence of host

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Tetranychus urticae	Cucumber (Cucumis sativus)