Síntese verde de material particulado à base de cobre utilizando extrato de folhas de Plinia cauliflora e avaliação da atividade antifúngica in vitro contra Fusarium solani

Abstract

In this study, copper oxide-based particles were synthesized using a green synthesis method, employing an aqueous extract of jabuticaba leaves (Plinia cauliflora) as a reducing and stabilizing agent, with adjustments to pH, temperature, and agitation parameters. The obtained material was characterized by Fourier Transform Infrared Spectroscopy with Attenuated Total Reflectance (FTIR-ATR), energy-dispersive X-ray fluorescence (EDX), Static Light Scattering (SLS), and Laser-Induced Breakdown Spectroscopy (LIBS), indicating the formation of copper-based particles associated with biomolecules derived from the plant extract. The antifungal efficacy was evaluated in vitro against Fusarium solani, a phytopathogen associated with soybean cultivation. The results demonstrated dose-dependent antifungal activity, with mycelial growth inhibition of 43.00% and 55.59% at concentrations of 100 and 250 ppm, respectively. The synthesized material showed superior performance compared to the conventional positive control, composed of copper hydroxide at 250 ppm, which did not exhibit inhibitory effects under the evaluated conditions. These findings indicate the potential of copper particles obtained through green synthesis as a promising alternative for the control of fungal diseases in agriculture, contributing to the reduction of agrochemical use and the development of more sustainable agricultural practices.