Systematic & Applied Acarology ISSN 1362-1971 An international journal of the Systematic and Applied Acarology Society, published since 1996 [Aims] [Editors] [Content] [Subscriptions] [Contact details] [Society Homepage]

Systematic & Applied Acarology (2009) 14, 91–100.

Life history and population growth parameters of Neoseiulus californicus (Acari: Phytoseiidae) fed on Thrips tabaci (Thysanoptera: Thripidae) in laboratory conditions

HASAN RAHMANI, YAGHOUB FATHIPOUR* & KARIM KAMALI

Department of Entomology, Faculty of Agriculture, Tarbiat Modares University, P. O. Box 14115-336, Tehran, Iran.

E-mail: fathi@modares.ac.ir

*Corresponding author

Abstract

The onion thrips, Thrips tabaci Lindeman, is an important polyphagous pest of vegetables and ornamentals in greenhouses. Neoseiulus californicus (McGregor) is a biological control agent of spider mites that also preys on thrips. Little is known about the biology and life table of N. californicus fed on Thrips tabaci. We evaluated the development, survivorship and life-history parameters of the Boku strain of N. californicus feeding on first instar larvae of T. tabaci. Total prey consumption by protonymphs and deutonymphs were 3.85 and 3.50, respectively. Total prey consumption during the adult period in the Boku strain was 65.1 first instar larvae of T. tabaci. Ninety percent of N. californicus eggs hatched but just over 16% of newly hatched larvae attained maturity at 25°C. Developmental time was 9.00 days with T. tabaci as prey. Oviposition rate was 2.42 eggs/female/day. The average pre-oviposition, oviposition and post-oviposition periods were 3.54, 22 and 3.91 days, respectively. The low estimated intrinsic rate of natural increase (rm) of N. californicus (0.041 per day with T. tabaci) was due to high juvenile mortalities.

Key words: Neoseiulus californicus, Thrips tabaci, Life history, Population growth parameters

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Accepted by O. Seeman: 2 Sept. 2009

 

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