Actinobacterias con potencial antagónico in vitro a hongos fitopatógenos y promoción del crecimiento en plantas de chile

The inhibitory potential of three strains of actinobacteria (B21, B22 and B37) against phytopathogens: Rhizoctonia solani, Phytophthora capsici and Fusarium oxysporum was evaluated in vitro using the technique of aperados culture, where at 72 h after confrontation the percentage of radial growth inhibition (PICR) by actinobacteria was evaluated. The results showed a variable PICR between 67.54 and 93.84% depending on the pathogen. Strain B22 was the one that showed an average PICR of 98.73% for the three phytopathogens. In the in vivo scrutiny, the chili plants inoculated with the actinobacteria showed higher plant height and greater dry weight of the fruits with respect to the control, which suggests that actinobacteria promote the growth of chili plants.