In vitro activity of essential oils of Lippia sidoides and Lippia gracilis and their major chemical components against Thielaviopsis paradoxa, causal agent of stem bleeding in coconut palms

AUTOR(ES)

Carvalho, Rejane Rodrigues da Costa e, Laranjeira, Delson, Carvalho Filho, José Luiz Sandes de, Souza, Paulo Estevão de, Blank, Arie Fitzgerald, Alves, Péricles Barreto, Jesus, Hugo Cesar Ramos de, Warwick, Dulce Regina Nunes

FONTE

Quím. Nova

DATA DE PUBLICAÇÃO

2013

RESUMO

Essential oils of Lippia sidoides, Lippia gracilis and their main chemical components were investigated for in vitro control of Thielaviopsis paradoxa. Mycelial growth and a number of pathogen conidia were inhibited by the essential oil of L. sidoides at all concentrations tested (0.2; 0.5; 1.0; 3.0 µL mL-1). L. sidoides oil contained 42.33% thymol and 4.56% carvacrol, while L. gracilis oil contained 10% thymol and 41.7% carvacrol. Mycelial growth and conidial production of T. paradoxa were completely inhibited by thymol at a 0.3 µL m-1 concentration. The results suggest that thymol could potentially be used for controlling coconut stem bleeding.

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