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Under cold and wet weather conditions, one of the most important diseases that affect potato crops is the rhizoctoniasis caused by the fungus Rhizoctonia solani Kuhn. Aiming to assess the effect of Plant Growth Promoting Rhizobacteria (PGPRs) in R. solani and to promote plant growth in potatoes, two strains of Bacillus subtilis (Bac17M8: T1 and Bac17M9: T2), native to the Peruvian plateau and B. amyloliquefaciens from Bolivia (T3), were used. Furthermore, soil infested with R. solani, without rizobacteria (T4) and without rizobacteria nor R. solani (T5) under greenhouse conditions was evaluated. The seedlings of Ccompis and Andina varieties inoculated with the three strains of PGPR showed lower mortality (average 18.90% and 12.13% in Ccompis and Andina, respectively) compared to non-inoculated (28.02% and 19.89% in Ccompis and Andina, respectively). Likewise, in both varieties, the tubers harvested from inoculated plots with rhizobacteria also presented lower incidence values (average 15.19% and 6.99% in Ccompis and Andina, respectively) and severity (5.75 to 9.06% and 5.73 to 7.31% in Ccompis and Andina, respectively), compared to tubers harvested from the non-inoculated plot that showed an incidence of 25.24% and 12.78% in Ccompis and Andina, respectively, and a severity greater than 30% in both varieties.

EFECTO DE RIZOBACTERIAS EN EL CONTROL DE Rhizoctonia solani EN EL CULTIVO DE PAPA