Browsing by Autor "Carlos Pinto"

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A Satellite Model of Forest Flammability
(Springer Science+Business Media, 2013) Marc K. Steininger; Karyn Tabor; Jennifer Small; Carlos Pinto; Johan Soliz; Ezequiel Chavez
Repellent activity of the essential oil from Laurelia sempervirens (Ruiz & Pav.) Tul. (Monimiaceae) on Triatoma infestans (Klug) (Reduviidae)
(University of Santiago, 2020) Marycruz Mojica; Raúl A. Alzogaray; Sofía L. Mengoni; Mercedes María Noel Reynoso; Carlos F. Pinto; Hermann M. Niemeyer; Javier Echeverría; Centro de Investigaciones de Plagas e Insecticida; Carlos Pinto; Universidad Mayor Real y Pontificia de San Francisco Xavier de Chuquisaca
Triatoma infestans (Klug) is the principal vector of Chagas disease in Bolivia and neighboring countries. The objective of this study was to determine the chemical composition of the EO of the Chilean laurel, Laurelia sempervirens (Ruiz & Pav.) Tul. (Monimiaceae) and to evaluate its repellent effect on fifth-instar nymphs of T. infestans. The EO from L. sempervirens was obtained by hydrodistillation and analyzed by gas chromatography coupled to mass spectrometry (GC-MS). Their main components were cis-isosafrole (89.8%), terpinene (3.9%), trans-ocimene (2.7%) and methyleugenol (2.2%). Repellency was evaluated on a circle of filter paper divided into two equal zones which were impregnated with test substances [EO or N,N-diethyl-3-methylbenzamide (DEET) as positive control] and acetone as blank control, respectively. Several concentrations of test substances between 4.125 and 132 g/cm 2 were tested. The EO from L. sempervirens produced significant repellency at concentrations equal or above 66.0 g/cm 2 , while DEET repelled starting at 16.5 g/cm 2 . Future works will be oriented to the study of repellent properties of cis-isosafrole alone and mixed with -terpinene, trans-ocimene and methyleugenol on T. infestans.