Efectos Larvicidas de Extractos Vegetales Acuosos sobre el Aedes Aegypti
Keywords:
Aedes aegypti, dengue, plant extracts, bioassaysAbstract
The aim of this study was to evaluate the activity of plant extracts: Chenopodim ambrosioides (Ka'are), Ruta graveolens (Ruda) and Artemisia absinthium (wormwood), Aloysia triphylla (lemon verbena), Petiveria paraguayensis (Pipi), Dorstenia brasiliensis (tarope), Lavender angustifolia (lavender), Rosmarinus officinalis (rosemary), against the larvae of the mosquito Aedes aegypti. Eggs were collected from different districts of the city of Encarnación (Paraguay) during the months of February and March 2014, using mosquito rearing cage containig water and extract of Cynodon dactylon (Bermuda grass). It was found that Ruta Graveolens had the most effective larvicidal effect, eliminating 60% of the larvae in 12 hours, and completetly in 24 hours of exposure. The Dorstenia brasiliensis, removed at eliminated completely in 48 hours. On the other hand Petiveria paraguayensis (Pipi) with 5000 mg/L. and Artemisia absinthium (ajenjo) needed 72 hours to reach the same result. Chenopodim ambrosiodes, Aloysia triphylla, Lavender angustifolia, Rosmarinus officinalis showed less larvicidal activity at these doses as they removed only up to 40%.
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