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Antifeedant activities of Tanacetum cadmeum ssp. cadmeum , Tanacetum parthenium , Tanacetum corymbosum ssp. cinereum , Tanacetum chiliophyllum var. chiliophyllum , Tanacetum kotschyi and Tanacetum cadmeum ssp. orientale were assessed on Spodoptera littoralis Boisd. (Lep: Noctuidae) third instar larvae. The highest antifeedant activities were found as 62 and 55.05% in the extracts of MeOH with T. cadmeum ssp. cadmeum aerial parts, MeOH with T. corymbosum ssp. cinereum flowers, respectively. Bioassay guided investigations on Tanacetum cadmeum ssp. cadmeum afforded three eudesmanolides; artesin (1), taurin (2), and artemin (3), three germacranolides; tavulin (4), tanachin (5), and tamirin (6), the coumarin; scopoletin (7), and two flavonol derivatives; tanetin (6-hydroxykaempferol 3,7,4′-trimethylether) (8) and 6-hydroxykaempferol 3,6-dimethylether (9). The structures of the compounds were elucidated by spectral methods, such as IR, UV, 1 H NMR and 13 C NMR (COSY, APT, DEPT, HMQC, HMBC, NOE, X-ray, EIMS, CIMS and HRMS). In this paper, the antifeedant activities of some Tanacetum species and the compounds isolated from T. cadmeum ssp. cadmeum are reported. |
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