| Beide Seiten der vorigen RevisionVorhergehende Überarbeitung | |
| melia_azedarach_l [2015/11/23 15:11] – andreas | melia_azedarach_l [2015/11/23 15:26] (aktuell) – andreas |
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| The meliacarpin derivatives 1,3-dicinnamoyl-11-hydroxymeliacarpin, 1-cinnamoyl-3-methacrylyl-11-hydroxymeliacarpin and 1-cinnamoyl-3-acetyl-11-hydroxymeliacarpin, were isolated as the principal insecticidal and growth disrupting constituents of Melia azedarach leaves. "The insecticidal properties of the new meliacarpin derivatives were examined using larvae of the polyphagous pest insect Spodoptera littoralis. When incorporated into artificial diet and offered to larvae in a chronic feeding bioassay, 1-cinnamoyl-3-acetyl-11-hydroxymeliacarpin exhibited an EC50 of 0.27 ppm and a LC50 of 0.48 ppm and is thus comparable with regard to insecticidal activity to the well known natural insecticide azadirachtin. Furthermore, all three meliacarpin derivatives had a pronounced detrimental influence on larval metamorphosis." \\ | The meliacarpin derivatives 1,3-dicinnamoyl-11-hydroxymeliacarpin, 1-cinnamoyl-3-methacrylyl-11-hydroxymeliacarpin and 1-cinnamoyl-3-acetyl-11-hydroxymeliacarpin, were isolated as the principal insecticidal and growth disrupting constituents of Melia azedarach leaves. "The insecticidal properties of the new meliacarpin derivatives were examined using larvae of the polyphagous pest insect Spodoptera littoralis. When incorporated into artificial diet and offered to larvae in a chronic feeding bioassay, 1-cinnamoyl-3-acetyl-11-hydroxymeliacarpin exhibited an EC50 of 0.27 ppm and a LC50 of 0.48 ppm and is thus comparable with regard to insecticidal activity to the well known natural insecticide azadirachtin. Furthermore, all three meliacarpin derivatives had a pronounced detrimental influence on larval metamorphosis." \\ |
| [Insecticidal meliacarpins (C-seco limonoids) from Melia azedarach., Bohnenstengel, F.I., Wray, V., Witte, L., Srivastava, R.P., Proksch, P., Phytochemistry, 50(6), 1999, 977-982] | [Insecticidal meliacarpins (C-seco limonoids) from Melia azedarach., Bohnenstengel, F.I., Wray, V., Witte, L., Srivastava, R.P., Proksch, P., Phytochemistry, 50(6), 1999, 977-982] |
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| | "Fruit extracts of M. azedarach have long been known to have insecticidal activities, in some cases comparable to that of neem. Like M. volkensii, M. azedarach lacks azadirachtins, but fruits produce the chemically related meliacarpins that have azadirachtin-like bioactivity in many types of insect." \\ |
| | [Isman, M. B. (2005). Chapter Six-Tropical Forests as Sources of Natural Insecticides. Recent Advances in Phytochemistry, 39, 145-161] |
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| "A formulation made with both extract and oil [obtained from fruits of Melia azedarach L.] at 10% plus the addition of emulsifier and preserving agents showed 92.3% pediculicidal activity. The products were also successful in delaying or inhibiting nymph emergence, with the formulation being the most effective, with a complete inhibition of emergence." \\ | "A formulation made with both extract and oil [obtained from fruits of Melia azedarach L.] at 10% plus the addition of emulsifier and preserving agents showed 92.3% pediculicidal activity. The products were also successful in delaying or inhibiting nymph emergence, with the formulation being the most effective, with a complete inhibition of emergence." \\ |
