Antagonism of Streptomyces spp. on Ralstonia solanacearum causing bacterial wilt in potatoes

Cieza-Barboza K.M.; Guevara-Quiroz N.J.; Ventura-Flores R. · Revista Mexicana de Ciencias Agricolas (2025) · DOI: 10.29312/remexca.v16i7.3775

Resumen

Bacterial wilt is a disease that affects the crops of potato, Solanum tuberosum, and is caused by Ralstonia solanacearum, which generates a decrease in productivity and economic losses for farmers. The objective was to evaluate the antagonistic activity of Streptomyces spp. against R. solanacearum, which causes bacterial wilt in S. tuberosum. A descriptive cross-sectional study was conducted, where seeding by depletion and streaking were used for bacterial isolates of tuber and soil samples. Antagonistic activity was assessed by perpendicular streaks. A total of 28 strains of R. solanacearum and 50 of Streptomyces spp. were isolated, and 22% of them inhibited the growth of the phytopathogenic bacterium. The results of the analysis of variance (Anova) showed a significant inhibitory effect of Streptomyces against R. solanacearum. For its part, Tukey’s test revealed differences between treatments. Therefore, Streptomyces spp. has the potential to be used as biocontrol agents, aspects that should be evaluated in experiments with potato plants.

Instituciones: Universidad Nacional Pedro Ruiz Gallo