Inhibition of mycelial growth of Fusarium oxysporum Schlechtend. f. sp. lycopersici (Sacc.) Snyder and Hansen, Rhizoctonia solani Kühn, and Verticilllium dahliae Kleb., by aqueous plant extracts.
López-Benítez A., López-Betancourt S. R., Vázquez-Badilio M. E., Rodríguez-Herrera S. A., Mendoza-Elos M., Padrón-Corral E.
Author Affiliation: Universidad Autónoma Agraria Antonio Narro, Departamento de Fitomejoramiento, Apdo. Postal 342, km 7.5 Carr. a Zacatecas, Buenavista, Saltillo, Coahuila, México C.P. 25315, Mexico.
Revista Mexicana de Fitopatología 23 : 183-190
Abstract : Aqueous plant extracts from garlic (Allium sativum), creosote bush (Larrea tridentata), tarbush (Flourensia cernua), clove (Syzygium aromaticum), cinnamon (Cinnamomum zeylanicum), and mango (Mangifera indica), were evaluated for in vitro mycelial growth inhibition on F. oxysporum f.sp. lycopersici (Fol), Rhizoctonia solani, and Verticillium dahliae. The fungicide tiabendazol at 600 ppm concentration totally inhibited growth of Fol and R. solani, while inhibition on V. dahliae varied from 80.7 to 90% after 144 and 72 h incubation period, respectively, and was surpassed by both extract concentrations (5 and 10%) of clove and garlic. The two clove extract concentrations inhibited 100% mycelial growth of the three fungal species after 72 h incubation period. In general, and with the exception of V. dahliae after 144 h of incubation, all extracts showed a tendency to increase their inhibition effect as concentration increased within the same incubation period, and to reduce it as incubation time increased within the same concentration. Extracts of clove, garlic, and creosote bush showed the highest inhibitory effect on the three fungal species.