Intraguild predation of Neoseiulus cucumeris by Stratiolaelaps miles and Atheta coriaria in greenhouse open rearing systems

摘要: Abstract We examined intraguild predation of Neoseiulus cucumeris Oudemans (Phytoseiidae) in breeder piles by the soil-dwelling predators, Stratiolaelaps miles (Berlese) (Laelapidae) and Atheta coriaria (Kraatz) (Staphylinidae) a greenhouse microcosm study. Each contained soybean plant ( Glycine max (L.) Merrill) N. pile alone, with either S. mites or A. , both . measured numbers their shared prey: Tyrophagus putrescentiae (Shrank) (Acaridae) mold incident thrips (Thripidae: Frankliniella occidentalis Thrips sp.). Peak populations canopies lacking and/or predators were fourfold greater than when other present. observed more microcosms where absent. had significant negative impact on numerical impacts There fewer T. containing (⩽1049.28 ± 301.72) compared treatments (⩾2428.16 ± 452.24) overall. fivefold all three alone predators. Our results demonstrate that greenhouses seeking to biologically manage should utilize alternative release strategies – i.e. hanging sachets repeated foliar applications.