Data/hora: 06/06/2024 11:27:14

Provedor de dados: | 86
País: | Brazil
Título: | Plant compounds insecticide activity against Coleoptera pests of stored products
Autores: | Moreira,Márcio Dionizio; Picanço,Marcelo Coutinho; Barbosa,Luiz Cláudio de Almeida; Guedes,Raul Narciso Carvalho; Campos,Mateus Ribeiro de; Silva,Gerson Adriano; Martins,Júlio Cláudio.
Data: | 2007-07-01
Ano: | 2007
Palavras-chave: | Natural insecticide; Pest management; Alternative control; Secondary metabolites.
Resumo: | 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.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2007000700001

Editor:

Embrapa Secretaria de Pesquisa e Desenvolvimento

Pesquisa Agropecuária Brasileira

Relação: | 10.1590/S0100-204X2007000700001
Formato: | text/html
Fonte: | Pesquisa Agropecuária Brasileira  v.42 n.7 2007
Fonte: | info:eu-repo/semantics/openAccess