title: Antifungal impact of volatile fractions of Peumus boldus and Lippia turbinata on Aspergillus section Flavi and residual levels of these oils in irradiated peanut.
abstract: To investigate the antifungal properties of essential oil (EO) vapors from boldo and poleo on Aspergillus section Flavi and the residual levels of the oils in peanut, irradiated peanuts conditioned at three water activities (0.98, 0.95, 0.93) were treated with 2 and 3 μL/g of boldo and 3 and 5 μL/g of poleo. EO treatments produced the greatest impact on fungal growth parameters, followed by oil concentrations and aW levels. The three main components in peanut exposed to oil vapors were piperitone oxide, α-terpinene and eucalyptol for boldo and β-caryophyllene epoxide, limonene and piperitenone for poleo. Residues of boldo and poleo EO were significantly decreased from 24.7 to 100% and from 26.6 to 99.7% at the end of the incubation period, respectively. The application of nontoxic boldo oil as fumigant in the control of Aspergillus section Flavi may represent a potential alternative antifungal treatment, without significant residues after 35 days.
authors.affiliation: Laboratorio de Ecología Microbiana, Departamento de Microbiología e Inmunología, Facultad de Ciencias Exactas Físico Químicas y Naturales, Universidad Nacional de Río Cuarto, Río Cuarto, Córdoba, Argentina; Research Career, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina. Electronic address: apassone@exa.unrc.edu.ar.
authors.forename: María Alejandra
authors.initials: MA
authors.lastname: Passone
authors.forename: Miriam
authors.initials: M
authors.lastname: Etcheverry
mesh_terms: D000935:Antifungal Agents / Q000032:analysis / Q000737:chemistry / Q000494:pharmacology; D010367:Arachis / Q000737:chemistry*; D001230:Aspergillus / Q000187:drug effects* / Q000254:growth & development; D005516:Food Microbiology; D032411:Lippia / Q000737:chemistry*; D009822:Oils, Volatile / Q000032:analysis* / Q000737:chemistry / Q000494:pharmacology*; D031611:Peumus / Q000737:chemistry*
chemical_list: D000935:Antifungal Agents; D009822:Oils, Volatile
keywords: Aspergillus section Flavi; Environmental factors; Essential oils; Fumigant activity; Peanut; Residues