Potential of three species of predatory phytoseiid mites as biological control agents of the peach silver mite, Aculus fockeui (Acari: Phytoseiidae and Eriophyidae)

Momen, F. M. (2009) Potential of three species of predatory phytoseiid mites as biological control agents of the peach silver mite, Aculus fockeui (Acari: Phytoseiidae and Eriophyidae). Acta Phytopathologica et Entomologica Hungarica, 44 (1). pp. 151-158. ISSN 0238-1249

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Abstract

The biology of Typhlodromips swirskii (Athias-Henriot), Typhlodromus negevi Swirski et Amitai and Amblyseius denmarki Zaher et El-Borolossy was studied using Aculus fockeui (Nalepa and Trouessart) active stages as food source. For T. swirskii , development was faster than in A. denmarki and T. negevi . In A. denmarki , the oviposition period was longer and reproduction was higher than in both predacious mites. A total of 49.4, 43.0 and 32.3 eggs per female, respectively, were obtained when A. denmarki, T. swirskii and T. negevi were fed on active stages of the peach silver mite. A diet of A. fockeui provided the highest female longevity and mean total fecundity, which resulted in the highest net reproductive rate (Ro = 35.568) for A. denmarki . The highest intrinsic rate of increase (rm = 0.244), finite rate of increase (λ = 1.2766) and shortest generation time (T = 13.784) were recorded for T. swirskii . The sex ratio of the progeny was strongly female biased (female/total = 0.72, 0.68) when active stages of A. fockeui were provided for A. denmarki and T. swirskii .

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