**5. Conclusions**

The obtained results of the current research confirmed the promising biological activity of *Actinomycetes*, particularly of the genus *Streptomyces*. This study also underlined the usefulness of the new isolated strains for producing some important bioactive metabolites and extracellular hydrolytic enzymes; hence, they can be effectively used as biocontrol agents against *S. sclerotiorum*. Furthermore, the studied isolates also demonstrated an important

plant-growth-promoting effect, which may be due to the production of phytohormones. Further studies remain necessary to identify and biochemically characterize the produced bioactive metabolites from the *Actinomycetes* isolates and evaluate their biological effects against other serious phytopathogens.

**Author Contributions:** Conceptualization, H.S.E. and I.C.; methodology, H.S.E.; formal analysis, H.S.E.; investigation, H.S.E. and I.C.; data curation, H.S.E. and I.C.; writing—original draft preparation, H.S.E.; writing—review and editing, H.S.E. and I.C. All authors have read and agreed to the published version of the manuscript.

**Funding:** This research received no external funding.

**Informed Consent Statement:** Not applicable.

**Data Availability Statement:** Not applicable.

**Conflicts of Interest:** The authors declare no conflict of interest.
