Antifungal Effects of Medicinal Plant Extracts on Soil-Borne Phytopathogens

The increasing environmental and health concerns associated with the extensive use of synthetic fungicides have created an urgent need to explore sustainable and eco-friendly alternatives for the management of agriculturally important fungal pathogens. In the present study, the in vitro antifungal potential of medicinal plant extracts was evaluated as environmentally compatible substitutes for synthetic fungicides against soil-borne, phytopathogenic, and mycotoxigenic fungi. Aqueous and methanolic extracts of Salix alba , Phytolacca acinosa , and Atropa acuminata were tested against nine pathogenic and toxin-producing fungal species, namely Aspergillus aflatoxiformans , Alternaria alternata , Cladosporium cladosporioides , Curvularia lunata , Fusarium metavorans , Fusarium solani , Fusarium oxysporum , Penicillium citrinum , and Rhizoctonia solani . Antifungal activity was assessed by measuring the reduction in mycelial growth in treated cultures compared with untreated controls. The results demonstrated that all tested plant extracts exhibited varying degrees of broad-spectrum antifungal activity, significantly inhibiting fungal growth relative to the control. Among the tested plants, Salix alba showed only mild inhibitory effects, whereas Phytolacca acinosa and Atropa acuminata displayed the strongest and most consistent antifungal activity against multiple fungal species, indicating their higher efficacy against both pathogenic and mycotoxigenic fungi. Overall, the findings highlight the potential of plant-derived bioactive compounds as effective and sustainable biocontrol agents. In particular, extracts of Phytolacca acinosa and Atropa acuminata appear to be promising eco-friendly alternatives to synthetic fungicides and may provide a practical approach to reducing chemical dependency and minimizing environmental risks in agricultural systems.