Evaluation of Stenotrophomonas maltophilia strain C3 for biocontrol of brown patch disease

Loren J. Giesler, Gary Y. Yuen

Research output: Contribution to journalArticlepeer-review

75 Scopus citations


Bacterial strains isolated from grass foliage were tested for inhibition of brown patch disease, caused by Rhizoctonia solani Kuhn, on detached blades and potted seedlings of tall fescue (Festuca arundinacea Schreb. cv. Kentucky 31). Stenotrophomonas maltophilia strain C3 prevented growth of the fungus on leaf blades and reduced the severity of necrosis on seedlings. When strain C3 was tested on tall fescue cv. 'Kentucky 31' planted at three seeding densities, biological control was not achieved. When the strain was applied to field plots of six tall rescue cultivars, the severity of brown patch disease was reduced in one cultivar, but increased in another. A rifampicin-resistant mutant strain of C3 applied to four cultivars was recovered from all of the canopies at approximately 106 CFU/g foliage throughout the experiment. This population level is over 10-fold lower than that associated with effective antagonism under laboratory conditions.

Original languageEnglish (US)
Pages (from-to)509-513
Number of pages5
JournalCrop Protection
Issue number6
StatePublished - Aug 1998


  • Biological control
  • Phyllosphere colonization
  • Rhizoctonia blight
  • Turfgrass

ASJC Scopus subject areas

  • Agronomy and Crop Science


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