Rendimento e ação fungitóxica dos extratos de folhas e cascas da Guazuma ulmifolia

Abstract

The objective of this work was to determine the yield of leaves and bark extracts of the Guazuma ulmifolia forest species, to identify the main chemical components of the extracts obtained, and to analyze the fungitoxic action of the phytopathogen Fusarium sp. For the determination of the humidity, the samples were inserted in aluminum forms, later placed in the oven at 50ºC for 4 days. In order to evaluate the yield of the samples in the Soxhlet extraction, the greenhouse filter cones were used at 50ºC, and in the cold maceration, the weight of the containers was evaluated. In the representativity of the extractions, ethyl alcohol presented higher yields for leaf and bark samples. In the phytopathogen bioassay, extracts of leaves and bark were selected in hexane and ethyl acetate at concentrations of 50,000 μL / mL at 1,000 μL / mL. The phytochemical analyzes were performed in CG (MS), using helium gas (He), and the main components detected in ethyl acetate extracts were: Fitol, Esqualeno, Tetracontano, Lupeol and Tocoferol (Vitamin E) for the leaves, and Linolenic Acid, Tocopherol, Squalene, Estigmasterol and Fucosterol, for bark