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Mechanisms of biological control of cotton bacterial blight by phylloplane antagonists. (56)

Research Notes
Sanjay Arya
Department of Plant Pathology, CCS Haryana Agricultural University, Hisar - 125 004, India
R.D. Parashar
Department of Plant Pathology, CCS Haryana Agricultural University, Hisar - 125 004, India
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Keywords

Biological control
Antibiosis
Siderophores
HCN
pH Change

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Mechanisms of biological control of cotton bacterial blight by phylloplane antagonists. (56). (2002). Tropical Agriculture, 79(1). https://journals.sta.uwi.edu/ojs/index.php/ta/article/view/1358
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Abstract

Four antagonists, viz., Bacillus sp., B. subtilis, 12D, and Pseudomonas fluorescens which were inhibitory towards bacterial blight of cotton (Xanthomonas axonopodis pv. malvacearum) in vitro were found to exert different mechanisms of biological control. All the antagonists produced antibacterial metabolites. Psuedomonas fluorescens and l2D produced siderophores and hydrocyanic acid. For the pathogen, low pH (5.5) was unfavourable and Bacillus sp. and l2D lowered the pH of the growth medium.
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