Predator Preference for Bt-Fed Spodoptera frugiperda (Lepidoptera: Noctuidae) Prey: Implications for Insect Resistance Management in Bt Maize Seed Blends
Jazyk angličtina Země Anglie, Velká Británie Médium print
Typ dokumentu časopisecké články
PubMed
28369505
DOI
10.1093/jee/tox098
PII: 3092231
Knihovny.cz E-zdroje
- Klíčová slova
- Cry1Ab, fall armyworm, multicolored Asian lady beetle, Harmonia axyridis, resistance management,
- MeSH
- Bacillus thuringiensis klasifikace MeSH
- bakteriální proteiny metabolismus MeSH
- biologická kontrola škůdců * MeSH
- brouci růst a vývoj fyziologie MeSH
- endotoxiny metabolismus MeSH
- geneticky modifikované rostliny genetika růst a vývoj fyziologie MeSH
- hemolyziny metabolismus MeSH
- kukuřice setá genetika růst a vývoj fyziologie MeSH
- larva růst a vývoj mikrobiologie fyziologie MeSH
- potravní řetězec * MeSH
- predátorské chování * MeSH
- Spodoptera růst a vývoj mikrobiologie fyziologie MeSH
- toxiny Bacillus thuringensis MeSH
- zvířata MeSH
- Check Tag
- zvířata MeSH
- Publikační typ
- časopisecké články MeSH
- Názvy látek
- bakteriální proteiny MeSH
- endotoxiny MeSH
- hemolyziny MeSH
- insecticidal crystal protein, Bacillus Thuringiensis MeSH Prohlížeč
- toxiny Bacillus thuringensis MeSH
Understanding indirect, trophic-level effects of genetically engineered plants, expressing insecticidal proteins derived from the bacterium, Bacillus thuringiensis (Bt), is essential to the ecological risk assessment process. In this study, we examine potential indirect, trophic-level effects of Bt-sensitive prey using the predator, Harmonia axyridis (Pallas), feeding upon Spodoptera frugiperda (J.E. Smith) larvae, which had delayed development (lower body mass) following ingestion of Cry1Ab maize leaves. We found no adverse effects on development and survival when H. axyridis larvae were fed S. frugiperda larvae that had fed on Cry1Ab maize tissue. Presence of Cry1Ab in H. axyridis decreased considerably after switching to another diet within 48 h. In a no-choice assay, H. axyridis larvae consumed more Bt-fed S. frugiperda than non-Bt-fed larvae. Preference for S. frugiperda feeding on Bt maize was confirmed in subsequent choice assays with H. axyridis predation on Bt-fed, 1-5-d-old S. frugiperda larvae. We suggest that H. axyridis preferred prey, not based on whether it had fed on Bt or non-Bt maize, but rather on larval mass, and they compensated for the nutritional deficiency of lighter larvae through increased consumption. Pest larvae with variable levels of resistance developing on Bt diet are often stunted versus sensitive larvae developing on non-Bt diet. It is possible that such larvae may be preferentially removed from local field populations. These results may have implications for insect resistance management and may be played out under field conditions where seed blends of Bt and non-Bt hybrids are planted.
Department of Entomology University of Minnesota 1980 Folwell Ave St Paul MN 55108 6125
Faculty of Science University of South Bohemia Branišovská 31 České Budějovice 370 05 Czech Republic
Institute of Entomology Biology Centre CAS Branišovská 31 Ceské Budejovice 370 05 Czech Republic
Institute of Entomology Biology Centre CAS Branišovská 31 České Budějovice 370 05 Czech Republic
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