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  • Trewia nudiflora  (1)
  • indole alkaloid  (1)
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  • 1
    Digitale Medien
    Digitale Medien
    Dithyreanitrile: an unusual insect antifeedant fromDithyrea wislizenii (1991)
    Springer
    Cellular and molecular life sciences 47 (1991), S. 304-306 
    Details
    ISSN: 1420-9071
    Schlagwort(e): Insect antifeedant ; indole alkaloid ; X-ray diffraction
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin
    Notizen: Summary Dithyreanitrile, a novel sulfur-containing indole alkaloid, was isolated from the seeds ofDithyrea wislizenii (Cruciferae). Dithyreanitrile inhibits feeding of fall armyworm (Spodoptera frugiperda) and European corn borer (Ostrinia nubilalis) larvae. Dithyreanitrile, the first natural product with two sulfur atoms and a nitrile attached to the same carbon, was characterized by X-ray diffraction, spectroscopy, and chemical synthesis.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01958168
    Standort Signatur Erwartet Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Biological activities ofTrewia nudiflora extracts against certain economically important insect pests (1982)
    Springer
    Journal of chemical ecology 8 (1982), S. 409-418 
    Details
    ISSN: 1573-1561
    Schlagwort(e): Pest control agent ; plant extract ; Trewia nudiflora ; trewiasine ; control agent ; antifeedant ; morphogenic agent
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Chemie und Pharmazie
    Notizen: Abstract An ethanol extract ofTrewia nudiflora (Euphorbiaceae) seed was tested as an agent for controlling several economically important insects. Results suggest that this plant extract acts as an antifeedant for the spotted cucumber beetle (Diabrotica undecimpunctata howardi Barber) and the European corn borer [Ostrinia nubilalis (Hübner)] but not for the other insects tested. Also indicated were morphogenic effects on the codlingmoth [Laspeyresia pomonella (L.)], disruption of the normal life cycle of the redbanded leafroller [Argyrotaenia velutinana (Walker)], and reduction in the progeny of the plum curculio [Conotrachelus nenuphar (Herbst)]. In addition, the extract was toxic to the striped cucumber beetle [Acalymma vittatum (F.)] and gave 100% control of the chicken body louse [Menacanthus stramineus (Nitzsch)] from 5 to 28 days. Fractionation of the extract was monitored by a bioassay usingO. nubilalis. This fractionation yielded six pure compounds, the most abundant of which was trewiasine. Its LD50 was 7.4 ppm when incorporated into the diet ofO. nubilalis. Dose-mortality relationships for the other compounds withO. nubilalis are presented.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00987789
    Standort Signatur Erwartet Verfügbarkeit
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    Artikel (Nationallizenzen)
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