Abstract

CUCA-SUAREZ, Luis Enrique et al. Acaricide activity of Lauraceae extracts agaisnt domiciliary mites Dermatophagoides farinae and Blomia tropicalis. Rev Cubana Plant Med [online]. 2012, vol.17, n.4, pp. 308-319. ISSN 1028-4796.

Introduction: Lauraceae plants are considered as important sources of bioactive substances, as those acting as insecticides. As part of our program for bioprospecting studies on Colombian Lauraceae plants, seven medicinal species belonging to this family were studied for their acaricide activity against Dermatophagoides farinae and Blomia tropicalis, considered public health problems at domiciliary level. Objective: to evaluate acaricide activity of ethanol extracts from Lauraceae plants on domiciliary mites Dermatophagoides farinae and Blomia tropicalis as well as to characterize ethanol-soluble extracts by preliminary phytochemical assay. Methods: in vitro acaricide activity of extracts from seven plants belonging to the Lauraceae family, harvested in different regions of Colombia, was assessed on individual adults through direct contact test and fumigant action. Each plant extract was tested for chemical characterization by means of coloration and precipitation tests. Results: in direct contact bioassay, the leaf extract from Persea caerulea eliminated 100 % of Dermatophagoides farinae. In fumigant action bioassay, the leaf extract of Persea caerulea eliminated 100 % Dermatophagoides farinae and 83.37 % of Blomia tropicalis (after 120 minutes exposure at 0.1 mg/mL). The preliminary phytochemical testing identified the possible presence of metabolites according to the Lauraceae chemotaxonomy. Conclusions: obtained results indicated that Lauraceae plants could be catalogued as a source of potential biocontrol agents against specific domiciliary mites Dermatophagoides farinae and Blomia tropicalis.

Keywords : Lauraceae; acaricide activity; Dermatophagoides farinae; Blomia tropicalis.

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