Study on biological control of some pest thrips species using predatory insects

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The current research aimed to study biological control of pest thrips Frankliniella occidentalis (PERGANDE) (Thy., Thripidae), Thrips tabaci LINDEMAN (Thy., Thripidae) and Gynaikothrips ficorum (MARCHAL) (Thy., Phlaeothripidae) using predatory bug species: Geocoris ochropterus FABR. (Het., Lygaeidae), Montandoniola moraguesi (PUTON) (Het., Anthocoridae), Orius similis ZHENG (Het., Anthocoridae) and Scipinia subula HSIAO et REN (Het., Reduviidae). Firstly, the biology and prey consumption of the four predatory bug species were experimented at temperature 25oC. In further research, G. ochropterus, which displayed high prey consumption, fecundity and long longevity, was selected to study its biology and prey consumption at temperatures 18 and 30oC. After that, its prey consumption in changing prey offer, the effect of extreme temperatures, its prey preference for prey ages and species, the effect of the different nutritions, as well as its cannibalism and the intraguild predation with O. similis were determined at temperature 25oC. Finally, greenhouse experiments were conducted to confirm the efficiency of G. ochropterus for the biological control of the pest thrips