Abstract
Laboratory studies were conducted to assess the toxicity and growth-inhibitory activity against Aedes aegypti larvae, of the crude acetone extracts of Polygonum senegalense (Meissn.) leaves, itsflavonoid component 2′,6′-dihydroxy-4′-methoxydihydrochalcone and the internal tissue flavanol quercetin. The first two showed significantly high insecticidal and growth-inhibitory activity even at low concentrations, whereas quercetin was toxic only at concentrations above 7μg/ml.
Résumé
Des études au laboratoire ont été menées pour déceler l’effet toxique et inhibiteur de croissance chez les larves d’Aedes aegypti, par emploi des extraits bruts à l’acétone obtenus des feuilles de Polygonum senegalense (Meissn.) et en comparaison avec ses composants flavonoïdes: 2′,6′- dihydroxy-4′-méthoxydihydrochalcone et du flavonol quercitine des tissus internes de la plante. Les deux premiers produits ont montré une activité hautement significative du pouvoir insecticide et d’effet inhibiteur de croissance même à des basses concentrations, au moment où la quercitine était seulement toxique à des concentrations supérieures à 7 μg/ml.
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Gikonyo, N.K., Mwangi, R.W. & Midiwo, J.O. Toxicity and Growth-Inhibitory Activity of Polygonum senegalense (Meissn.) Surface Exudate against Aedes aegypti Larvae. Int J Trop Insect Sci 18, 229–234 (1998). https://doi.org/10.1017/S1742758400023456
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DOI: https://doi.org/10.1017/S1742758400023456