Biological control of onion leaf blight disease by bulb and foliar application of powder formulation of antagonist mixture

M. Karthikeyan, K. Radhika, R. Bhaskaran, S. Mathiyazhagan, R. Sandosskumar, R. Velazhahan, D. Alice

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11 Citations (Scopus)


Three antagonists: Pseudomonas fluorescens (Pf1), Bacillus subtilis and Trichoderma viride, were tested alone and in combination for suppression of onion leaf blight (Alternaria palandui) disease under glasshouse and field conditions. The average mean of disease reduction was 24.81% for single strains and 42.44% for mixtures. In addition to disease suppression, treatment with a mixture of antagonists promoted plant growth in terms of increased plant height and ultimately bulb yield. Though seed treatment of either single strain or strain mixtures alone could reduce the disease, subsequent application to root, leaves or soil further reduced the disease and enhanced the plant growth. The mixture consisting of Pseudomonas fluorescens Pf1 plus Bacillus subtilis plus Trichoderma viride was the most effective in reducing the disease and in promoting plant growth and bulb yield in greenhouse and field tests.

Original languageEnglish
Pages (from-to)407-417
Number of pages11
JournalArchives of Phytopathology and Plant Protection
Issue number6
Publication statusPublished - Sep 2008



  • Alternaria palandui
  • Antagonistic mixture
  • Bacillus subtilis
  • Onion
  • Pseudomonas fluorescens
  • Trichoderma viride

ASJC Scopus subject areas

  • Plant Science
  • Agronomy and Crop Science

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