Insecticidal defenses of Piperaceae from the neotropics |
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| Authors: | C B Bernard H G Krishanmurty D Chauret T Durst B J R Philogène P Sánchez-Vindas C Hasbun L Poveda L San Román J T Arnason |
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| Affiliation: | (1) Institutes of Biology and Chemistry, University of Ottawa, KIN 6N5 Ottawa, Ontario, Canada;(2) Department of Chemistry, University of Delhi, Delhi, India;(3) Facultad de Ciencias de la Tierra y el Mar, Universidad Nacional, Heredia, Costa Rica |
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| Abstract: | Insecticidal and growth-reducing properties of extracts of 14 species of American neotropical Piperaceae were investigated by inclusion in diets of a polyphagous lepidopteran, the European corn borer,Ostrinia nubilalis. Nutritional indices suggested most extracts acted by postdigestive toxicity.Piper aduncum, P. tuberculatum, andP. decurrens were among the most active species and were subjected to bioassay-guided isolation of the active components. Dillapiol was isolated from the active fraction ofP. aduncum, piperlonguminine was isolated fromP. tuberculatum, and a novel neolignan fromP. decurrens. The results support other studies on Asian and AfricanPiper species, which suggest that lignans and isobutyl amides are the active defence compounds in this family. |
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| Keywords: | Piperaceae botanical insecticide isobutyl amides lignans dillapiol conocarpan piperlonguminine European corn borer |
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