Soil Bacteria as Potential Biological Control Agents of Fusarium Species Associated with Asparagus Decline Syndrome

To avoid the use of agrochemicals in agriculture, alternative methods are emerging to control plant pathogens. Some growth-promoting rhizobacteria (PGPR) can be used as biocontrol agents since they induce protection against The aim this study was evaluate protective effect several PGPR strains main Fusarium species involved asparagus decline syndrome (ADS): F. proliferatum, oxysporum f. sp. asparagi and redolens. In vitro antagonism assays showed that all bacteria inhibited mycelium growth three species. most effective (Streptomyces fradiae Hvs6, Bacillus paralicheniformis Hvs2 velezensis FC37) were tested their on plants inoculated with pathogenic isolates. Strains FC37 controlling proliferatum asparagi, but neither could protect redolens production hydrolytic enzymes such ?-glucosidase, amylase protease by these bacterial structural degradation fungal cell wall. addition, toxic volatile compounds, hydrogen cyanide, may inhibit growth, phosphate solubilizers related promotion. These results suggest potential a sustainable environmentally friendly strategy for ADS-affected fields.