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Title

Intraspecific virulence of entomopathogenic nematodes against the pests Frankliniella occidentalis (Thysanoptera: Thripidae) and Tuta absoluta (Lepidoptera: Gelechiidae) [Dataset]

AuthorsCampos-Herrera, Raquel CSIC ORCID ; Vicente-Díez, Ignacio CSIC; Galeano, Magda; Chelkha, Maryam CSIC ORCID; González-Trujillo, María del Mar CSIC ORCID; Puelles, Miguel CSIC ORCID CVN; Labarga, David CSIC ORCID; Pou, Alicia CSIC ORCID; Calvo-Garrido, Javier CSIC; Belda, J. E.
KeywordsHeterorhabditis
Steinernema
Tomato
Aerial insect-pests
Issue DateMar-2022
PublisherDIGITAL.CSIC
CitationCampos-Herrera,R., Vicente-Díez,I., Galeano,M., Chelkha,M., Chelkha,M., del Mar González-Trujillo,M., Puelles,M., Labarga,D., Pou,A., Calvo,J., & Belda,J.E.(2022).Intraspecific virulence of entomopathogenic nematodes against the pests Frankliniella occidentalis (Thysanoptera: Thripidae) and Tuta absoluta (Lepidoptera: Gelechiidae) [Dataset]; DIGITAL.CSIC, https://doi.org/10.20350/digitalCSIC/14558
AbstractThe data were generated by the authors in independent experiments, all performed in the same conditions and installations. All the experiments were performed twice and the data corresponding with trials 1 and 2 of the same set was compared to allow combination in the statistical analysis. Each trial was performed with new and fresh nematodes and insects
Entomopathogenic nematodes (EPN) are excellent biocontrol agents against various insect pests. Novel biotechnological approaches can enhance their utility against insects above-ground, opening a new venue for selecting superior EPN against certain insects. We hypothesize that different populations of the same species but from different origins (habitat, ecoregion) will differ in their virulence. This study aimed to evaluate the virulence of various EPN populations against two pests of worldwide incidence and damage to high value crops: Frankliniella occidentalis (Thysanoptera: Thripidae) and Tuta absoluta (Lepidoptera: Gelechiidae). We tested 10 EPN populations belonging to three EPN species: Heterorhabditis bacteriophora (Koppert, MG-618b, AM-203, RM-102), Steinernema feltiae (Koppert, RS-5, AM-25, RM-107), and Steinernema carpocapsae (Koppert, MG-596a). Each EPN population was tested at two concentrations. Frankliniella occidentalis was tested at 160 and 80 IJs/cm2 and T. absoluta at 21 and 4 IJs/cm2. Control treatments followed the same experimental procedure but only adding distilled water. Overall, whenever different, higher IJs concentration resulted in lower adult emergence, higher larval mortality, and shorter time to kill the insects. Considering the low concentration, S. feltiae provided the best results for both insects and instars investigated, while H. bacteriophora and S. carpocapsae required a high concentration to reach similar or slightly better results. Differences among populations of each of the species were detected, but only the native populations of H. bacteriophora populations showed consistently higher control values against both insects/instar compared with the commercial one. Differences among S. feltiae and S. carpocapsae populations depended on the IJs concentration, insect, and instar. We consider S. feltiae a very promising species for their application against F. occidentalis and T. absoluta, with the Koppert population as the most consistent among the populations tested. Specific EPN-populations of S. carpocapsae and H. bacteriophora were good candidates against certain instar/insects at high concentrations. This study emphasized the importance of intraspecific variability for EPN virulence.
URIhttp://hdl.handle.net/10261/264100
DOI10.20350/digitalCSIC/14558
ReferencesCampos-Herrera,R., Vicente-Díez,I., Galeano,M., Chelkha,M., Chelkha,M., del Mar González-Trujillo,M., Puelles,M., Labarga,D., Pou,A., Calvo,J., & Belda,J.E.(2021).Intraspecific virulence of entomopathogenic nematodes against the pests Frankliniella occidentalis (Thysanoptera: Thripidae) and Tuta absoluta (Lepidoptera: Gelechiidae).Journal of Nematology, 53(i_current), 1-14.http://dx.doi.org/10.21307/jofnem-2021-102, http://hdl.handle.net/10261/262566
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