Insect antifeedant compounds from Nothofagus dombeyi and N. pumilio |
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| Authors: | Thoison Odile Sévenet Thierry Niemeyer Hermann M Russell Graeme B |
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| Institution: | Institut de Chimie des Substances Naturelles, CNRS, Avenue de la Terrasse, Bat. 27, F-91198, Gif-Sur-Yvette, France. |
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| Abstract: | A bioassay-guided purification of the extracts of Nothofagus dombeyi and N. pumilio leaves yielded several triterpenes and flavonoids including 2-O-acetylmaslinic acid, 3-O-acetyl 20,24,25-trihydroxydammarane, and 3,20,24,25-tetrahydroxydammarane as new natural products. All the isolated compounds were assessed for antifeeding activity against the 5th instar larvae of Ctenopsteustis obliquana. 12-Hydroxyoleanolic lactone and pectolinarigenin from N. dombeyi and dihydrooroxylin A from N. pumilio, showed significant antifeeding activity. |
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| Keywords: | Nothofagus dombeyi Nothofagus pumilio Fagaceae Insect antifeeding activity Flavonoids Triterpenes |
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