Data/hora: 05/06/2024 16:24:30

Provedor de dados: | 64
País: | Brazil
Título: | Chemical composition and fumigant effect of essentialoil of Lippia sidoides Cham. and monoterpenes against Tenebrio molitor (L.) (coleoptera: tenebrionidae)
Autores: | Lima,Rafaela Karin; Cardoso,Maria das Graças; Moraes,Jair Campos; Carvalho,Stephan Malfitano; Rodrigues,Vanessa Gregório; Guimarães,Luiz Gustavo Lima.
Data: | 2011-08-01
Ano: | 2011
Palavras-chave: | "Alecrim pepper"; Mealworm; Natural compound; Toxicity; Synergism.
Resumo: | The chemical composition of Lippia sidoides essential oils obtained by hydrodistillation was characterized and quantified by GC/MS and their insecticidal activity by fumigation test was assayed against Tenebrio molitor. Moreover, the toxicity of monoterpenes carvacrol, 1,8-cineol and thymol were also evaluated when applied alone or in binary (1:1) or tertiary (1:1:1) mixture. The essential oil of L. sidoides has as major constituents carvacrol (31.68%), ρ-cymene (19.58%), 1,8-cineole (9.26%) and ϒ-terpinene (9.21%), from a 21 compounds identified, being 92.53% of total. Both compounds have insecticidal activity against T. molitor, being the degree of toxicity of carvacrol &gt; 1,8-cineole &gt; L. sidoides essential oil &gt; thymol, and its respectively LC50 at 24h were 5.53; 5.71; 8.04 and 14.71 µL/L air. When the different mixture of carvacrol, 1,8-cineole and thymol was assayed against T. molitor, the synergism among them was observed. For the mixture of carvacrol:1,8-cineole LC50 was 5.34 µL/L air; carvacrol:thymol 7.67 µL/L air; 1,8-cineole:thymol 7.51 µL/L air and carvacrol:1,8-cineole:thymol 6.34 µL/L air. Mainly, the monoterpene thymol had a synergic effect, which increased the toxicity of carvacrol and 1,8-cineole, both in binary mixture like carvacrol:thymol and 1,8-cineole:thymol.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542011000400004
Editor: | Editora da Universidade Federal de Lavras
Relação: | 10.1590/S1413-70542011000400004
Formato: | text/html
Fonte: | Ciência e Agrotecnologia  v.35 n.4 2011
Fonte: | info:eu-repo/semantics/openAccess