ESTUDO FÍSICO-QUÍMICO E AVALIAÇÃO DO POTENCIAL LARVICIDA DO EXTRATO ETANÓLICO DAS CASCAS DO CAULE DE Licania macrophylla BENTH

This study sought to quantify the presence of micro-and macronutrients and evaluate the larvicidal potential of the crude ethanol extract of the stem bark of the species Licania macrophylla Benth. The quantification of micro and macronutrients was performed by atomic absorption spectrometry and the potential larvicidal bioassay carried forward to the third stage larvae of mosquito Aedes aegypti development. The values quantified by atomic absorption spectrometry were 25,56 ± 2,90 mg.L -1 for calcium, 2,62 ± 0,16 mg.L -1 to magnesium, 2,40 ± 1,45 mg.L -1 for potassium, 0,004 ± 0,005mg. L -1 for iron, 0,02 ± 0,01 mg.L -1 for zinc and 0,00 mg.L -1 for copper. In bioassay potential larvicidal the crude ethanol extract has low mortality rate in the concentrations tested CL 50 de 1497,19 ppm, probably in which, secondary metabolites with this activity are not in adequate concentrations to cause mortality, because it is crude extract. The micro and macronutrients are essential for the development of vegetable and essential for production of secondary metabolites, either through the process of photosynthesis and the uptake of nutrients in the soil. Keywords: nutrients; larvicidal activity; dengue; atomic absorption.