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Virulence and efficacy of different entomopathogenic nematode species against western flower thrips (Frankliniella occidentalis)
Authors:Raisa Chyzik  I Glazer  M Klein
Institution:1. Dept. of Entomology, ARO, The Volcani Center, 50250, Bet Dagan, Israel
2. Dept. of Nematology, ARO, The Volcani Center, 50250, Bet Dagan, Israel
Abstract:Virulence and efficacy of five species and strains of the entomopathogenic nematodes of the families Steinernematidae and Heterorhabditidae:Steinernema riobravis, Steinernema feltiae strains Ger. and UK, andHeterorhabditis bacteriophora strains HP88 and IS5, against the prepupal and pupal stages of the western flower thrips (WFT),Frankliniella occidentalis (Pergande) (Thysanoptera: Thripidae), were investigated in the laboratory. Although all these nematodes controlled WFT to some extent, they differed in efficiency. The heterorhabditid nematodeH. bacteriophora strain HP88 was more specific to the soil-inhabiting WFT stages (36–49% thrips mortality). The steinernematid nematodesS. riobravis andS. feltiae strains Ger. and UK had only a slight effect (10% mortality) on prepupal and pupal populations of WFT, andH. bacteriophora strain IS5 had the least effect of all. A possible reason for such species variation is suggested and discussed.
Keywords:
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