The present invention includes compositions and methods for treating plants or grass for a phytopathogenic microorganism comprising: identifying a plant or grass in need of treatment for Goss or Stewart Wilt； and spraying the plant or grass with a cell suspension, supernatant, filtrate, cell fraction, or whole cell broth derived from a Bacillus amyloliquefaciens and/or Bacillus subtilis, effective to inhibit said phytopathogenic microorganisms such as Clavibacter michiganensis or Pantoea stewartii (Erwinia stewartia).
