Contribution à l'étude de l'activité biologique d'extraits de feuilles de Cestrum parqui L'Herit.(Solanaceae) sur le criquet pélerin Schistocerca gregaria (Forsk)
| Autor: | Barbouche N., Ammar M., Hajjem B., Lognay G. |
|---|---|
| Jazyk: | English<br />French |
| Rok vydání: | 2001 |
| Předmět: |
solanaceae
botanical insecticides plant extracts saponins toxicity schistocerca gregaria acrididae biopesticides botanical pesticides carbohydrates extracts glycosides insecta insecticides orthoptera pesticides processed plant products processed products schistocerca Biotechnology TP248.13-248.65 Environmental sciences GE1-350 |
| Zdroj: | Biotechnologie, Agronomie, Société et Environnement, Vol 5, Iss 2, Pp 85-90 (2001) |
| Druh dokumentu: | article |
| ISSN: | 1370-6233 1780-4507 |
| Popis: | Contribution to the study of the biological activity of Cestrum parqui L'Herit. extracts against the locust Schistocerca gregaria (Forsk). The leaves of Cestrum parqui L'Herit. (Solanaceae), a common ornamental shrub in North Africa showed strong insecticide activity against the locust Schistocerca gregaria. The first part of this paper deals with a phytochemical survey of C. parqui. The second one reports on the toxicity of methanolic extracts (EB) of leaves and fractions thereof. The mortality in treated insects (at the 5th instar) injected with aqueous solutions of EB or fractions reached 100/ within a period of 2 to 4 days. The bioassays undertaken with two fractions F37 (recovered from EB by solid phase extraction) and ESB (resulting from the diethylether precipitation from EB methanolic solution) exhibited a similar toxicity. The n-hexane extracts obtained after F37 and ESB acidic hydrolysis showed the same TLC patterns. The toxicity of C. parqui is related to the occurrence of saponins. |
| Databáze: | Directory of Open Access Journals |
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