| In vitro: |
| Records of Natural Products, 2009 ,3 (2) :96-103. | | Antifeedant activities of the erythrinaline alkaloids from Erythrina latissima against Spodoptera littoralis (Lepidoptera noctuidae).[Reference: WebLink] |
METHODS AND RESULTS:
The antifeedant activities of the Erythrina alkaloids from the seeds, seed pods and flowers ofErythrina latissima were investigated in laboratory dual- choice bioassays using third-instar Spodoptera littoralis(Boisduval) larvae. The new compound (+)-11-methoxy-10-oxoErysotramidine (1) from the flowers, showedpotent dose dependant activity at concentration 3 500 ppm while (+)-10,11-dioxoErysotramidine (2) also newfrom the flowers showed potent dose dependant activity at concentration 3100 ppm. Three known compounds(+)-erysotrine, (+)-Erysotramidine, (+)-erythraline, (+)-11-hydroxyErysotramidine showed potent dosedependant antifeedant activity at concentrations 3100 ppm while (+)-10,11-dioxoerysotrine and (+)-11b-hydroxyErysotramidine also a known compounds showed potent dose dependant antifeedant activity atconcentrations 3 300 ppm.
CONCLUSIONS:
Three known compounds (+)-11-methoxyErysotramidine, (+)-8-oxoerythralineand (+)-15(16)b-D-glucoerysodine showed no appreciable change in antifeedant activity with concentrationchange. |
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