Toxicity and Growth-Inhibitory Activity of Polygonum senegalense (Meissn.) Surface Exudate against Aedes aegypti Larvae
- 19 September 1998
- journal article
- research article
- Published by Springer Nature in International Journal of Tropical Insect Science
- Vol. 18 (3) , 229-234
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, its flavonoid 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. 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.Keywords
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