Browsing by Author "Ehlers, Ralf-Udo"
Now showing 1 - 2 of 2
- Results Per Page
- Sort Options
Item Comparison of some characterizations of recovered from soil and newly fermented entomopathogenic nematode, heterorhabditis bacteriophora (rhabditida: heterorhabditidae)(Uludağ Üniversitesi, 2008) Ehlers, Ralf-Udo; Susurluk, I. Alper; Uludağ Üniversitesi/Ziraat Fakültesi/Bitki Koruma Bölümü.Entomopathogenic nematodes (EPNs) in the families Heterorhabditidae and Steinernematidae have considerable potential as biological control agents of soil-inhabiting insect pests. One of the most important factors for sustainable biological control is their successful establishment in the soil, infectivity against pest insects, reproductive potential and persistence in released areas. To determine the differences of infectivity, reproductive potential and persistence between recovered from the field one year after release and newly fermented (one-week-old) Heterorhabditis bacteriophora in a bioreactor, the two type populations of H. bacteriophora were compared each other on these capabilities. Prior to study, the fermented nematodes were reproduced once in Galleria mellonella larvae in order to achieve equal conditions with recovered populations. The results showed that infectivity and reproduction potentials of recovered populations were significantly higher than newly fermented or laboratory populations of the nematode. However, differences of persistence of both populations were not significant. This is the first report that quality control of some biological abilities of H. bacteriophora after one year in field.Item Sustainable control of black vine weevil larvae, Otiorhynchus sulcatus (Coleoptera : Curculionidae) with Heterorhabditis bacteriophora in strawberry(Taylor & Francis, 2008) Ehlers, Ralf-Udo; Susurluk, Alper; Uludağ Üniversitesi/Ziraat Fakültesi/Bitki Koruma Bölümü.; AAG-7131-2021; 22036687000Efficacy, persistence and recovery of the nematode Heterorhabditis bacteriophora was tested in the laboratory after application of the nematode to strawberry roots by dipping. To mitigate nematode sedimentation and improve attachment to strawberry roots, carboxy-methyl-cellulose was added to the nematode solution. Mortality of black vine weevil Otiorhynchus sulcatus varied between 90 and 96% in the pot trials.