title: [Preliminary study of the molluscacide properties of guayacil: a raw extract of Guayacum officinale].
abstract: This paper reports the results of a preliminary study of the mollusk-killing properties of guayacil, a raw extract of the plant Guayacum officinalis, on Biomphalaria glabrata. Mollusks are exposed to several concentrations of the substance for periods ranging from 1, 6, and 24 hours and then were allowed to recover, according to the recommendations of the World Health Organization. The results indicate that guayacil has molusk-killing properties with an LC50 of 0.45 ppm and an LC90 of 0.95 ppm at 24 degrees C. Larger concentrations of 1 ppm resulted in 100% death rate, while 0.1 ppm did not prove lethal. All parts of the plant contain the active ingredient. Concentrations lower than 1 ppm are not lethal for flora or fauna.
authors.forename: J D
authors.initials: JD
authors.lastname: Gómez
authors.forename: E A
authors.initials: EA
authors.lastname: Malek
authors.forename: M
authors.initials: M
authors.lastname: Vargas
mesh_terms: D000818:Animals; D001700:Biomphalaria; D004305:Dose-Response Relationship, Drug; D008975:Molluscacides; D010936:Plant Extracts / Q000494:pharmacology*; D013997:Time Factors
chemical_list: D008975:Molluscacides; D010936:Plant Extracts
vernacular_title: Estudio preliminar de las propiedades molusquicidas del guayacil: extracto crudo de Guayacum officinale.