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Effect of site location and collecting period on the chemical composition of hyptis spicigera lam. an insecticidal essential oil from North-Cameroon / Félicité Noudjou in The journal of essential oil research, Vol. 19 N°6 (Novembre/Decembre 2007) 

Public ISBD [article]  in The journal of essential oil research > Vol. 19 N°6 (Novembre/Decembre 2007) . - pp. 597-601 Titre : Effect of site location and collecting period on the chemical composition of hyptis spicigera lam. an insecticidal essential oil from North-Cameroon Type de document : texte imprimé Auteurs : Félicité Noudjou, Auteur ; Habiba Kouninki, Auteur ; Léonard S. T. Ngamo, Auteur Année de publication : 2008 Article en page(s) : pp. 597-601 Note générale : Génie Chimique Langues : Anglais (eng) Mots-clés : Hyptis  spicigera  Lamiaceae  Essential  oil  composition  α-pinene  α-phellandrene  β-caryophyllene  Insecticidal  activity  Callosobruchus  maculates  Vigna  unguiculata Résumé : Hyptis spicigera essential oils from seven localities in the North-Cameroon (Ngaoundere, Guirvidig, Kodeck, Lara, Toloum, Kaele, Tchecal-baila) were investigated by GC and GC/MS. Results showed differences within harvesting sites and between the different sites of collection but did not revealed clear tendencies in the evolution of the oil composition with regard to the sampling period. The main group of compounds in all the analyzed samples were: α-pinene (11.9%-42.1%), β-pinene + sabinene (6.0%-39.8%) and β-phellandrene + 1,8-cineole (8.8%-27.4%) except in one oil where β-caryophyllene (23.4%) was the principal component. The insecticidal activity of H. spicigera and its principal terpenic components was evaluated against the cowpea weevil Callosobruchus maculatus F., the major cause of damages of cowpea (Vigna unguiculata (L.) Walp) in North Cameroon. ISSN : 1041-2905 En ligne : http://www.tandfonline.com/doi/abs/10.1080/10412905.2007.9699340#.UXJ3EkqC5mM [article] Effect of site location and collecting period on the chemical composition of hyptis spicigera lam. an insecticidal essential oil from North-Cameroon [texte imprimé] / Félicité Noudjou, Auteur ; Habiba Kouninki, Auteur ; Léonard S. T. Ngamo, Auteur . - 2008 . - pp. 597-601. Génie Chimique Langues : Anglais (eng) in The journal of essential oil research > Vol. 19 N°6 (Novembre/Decembre 2007) . - pp. 597-601 Mots-clés : Hyptis  spicigera  Lamiaceae  Essential  oil  composition  α-pinene  α-phellandrene  β-caryophyllene  Insecticidal  activity  Callosobruchus  maculates  Vigna  unguiculata Résumé : Hyptis spicigera essential oils from seven localities in the North-Cameroon (Ngaoundere, Guirvidig, Kodeck, Lara, Toloum, Kaele, Tchecal-baila) were investigated by GC and GC/MS. Results showed differences within harvesting sites and between the different sites of collection but did not revealed clear tendencies in the evolution of the oil composition with regard to the sampling period. The main group of compounds in all the analyzed samples were: α-pinene (11.9%-42.1%), β-pinene + sabinene (6.0%-39.8%) and β-phellandrene + 1,8-cineole (8.8%-27.4%) except in one oil where β-caryophyllene (23.4%) was the principal component. The insecticidal activity of H. spicigera and its principal terpenic components was evaluated against the cowpea weevil Callosobruchus maculatus F., the major cause of damages of cowpea (Vigna unguiculata (L.) Walp) in North Cameroon. ISSN : 1041-2905 En ligne : http://www.tandfonline.com/doi/abs/10.1080/10412905.2007.9699340#.UXJ3EkqC5mM