Keywords: بمبی بروم; d; day; DB; downy brome; h; hour; JG; jointed goatgrass; KB; King's B; MH; medusahead; P.f.; Pseudomonas fluorescens (Flügge) Migula; SR; Sands and Rovira selective medium; Bioherbicide; Benign traits; Cheatgrass; Seed bank; Weed-suppressive bacteria;