Data/hora: 01/06/2024 09:10:01

Biblioteca(s): 	Epagri-Sede.	
Data corrente: 	06/05/2009	
Data da última atualização: 	06/05/2009	
Autoria: 	MOREIRA, M.D.; PICANÇO, M.C.; BARBOSA, L.C. de A.; GUEDES, R.N.C.; CAMPOS, M.R. de; SILVA, G.A.; MARTINS, J.C.	
Título: 	Plant compounds insecticide activity against Coleoptera pests of stored products.	
Ano de publicação: 	2007	
Fonte/Imprenta: 	Pesquisa Agropecuária Brasileira, Brasília, v. 42, n.7, p. 909-915, jul. 2007.	
Idioma: 	Inglês	
Conteúdo: 	The objective of this work was to screen plants with insecticide activity, in order to isolate, identify and assess the bioactivity of insecticide compounds present in these plants, against Coleoptera pests of stored products: Oryzaephilus surinamensis L. (Silvanidae), Rhyzopertha dominica F. (Bostrichidae) and Sitophilus zeamais Mots. (Curculionidae). The plant species used were: basil (Ocimum selloi Benth.), rue (Ruta graveolens L.), lion's ear (Leonotis nepetifolia (L.) R.Br.), jimson weed (Datura stramonium L.), baleeira herb (Cordia verbenacea L.), mint (Mentha piperita L.), wild balsam apple (Mormodica charantia L.), and billy goat weed or mentrasto (Ageratum conyzoides L.). The insecticide activity of hexane and ethanol extracts from those plants on R. dominica was evaluated. Among them, only hexane extract of A. conyzoides showed insecticide activity; the hexane extract of this species was successively fractionated by silica gel column chromatography, for isolation and purification of the active compounds. Compounds 5,6,7,8,3',4',5'-heptamethoxyflavone; 5,6,7,8,3'-pentamethoxy-4',5'-methilenedioxyflavone and coumarin were identified. However, only coumarin showed insecticide activity against three insect pests (LD50 from 2.72 to 39.71 mg g-1 a.i.). The increasing order of insects susceptibility to coumarin was R. dominica, S. zeamais and O. surinamensis.	
Palavras-Chave: 	Alternative control; Controle alternativo; Inseticida natural; Manejo de praga; Metabolito secundário; Natural insecticide; Pest management; Praga de planta; Secondary metabolites.	
Categoria do assunto: 	--	
Registro original: 	Epagri-Sede (Epagri-Sede)