ABSTRACT

Fusarium species are the cause of diseases in various crops throughout the world and cause significant economic losses. Chemical fungicides are the main strategy for control, but their intensive and long-term use generates resistance, toxic residues, and environmental contamination. The biological control of bioactive substances has wide applications. In this study, the fungicidal activity of the extract obtained from Annona glabra L. seeds was evaluated as a control alternative for Fusarium solani. In addition, chemical characterization was carried out to identify the groups of metabolites present in the extract. The fungicidal activity against F. solani was evaluated using the microdilution method, and the minimum inhibitory concentration (MIC) was established, as well as the mean inhibitory concentration (IC₅₀). The IC₅₀ of the extract was 972.24 mg L^-1, and the MIC was 12.02 mg L^-1. Using chemical characterization by ultrahigh-efficiency liquid chromatography coupled with mass spectrometry, the presence of THF acetogeniones, isoquinolinic alkaloids, and kaurene-type diterpenes, which were the main compounds responsible for the activity evaluated, was confirmed. The results obtained provide evidence that A. glabra seed extracts can be a potential source of metabolites with fungicidal activity.

Keywords
Annonaceae; Acetogenins; Alkaloids; Biological control; Terpenoids