Population dynamics of cotton phylloplane bacteria antagonistic towards Xanthomonas campestris pv. malvacearum
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Authors
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S. SAHA, R.P. SINGH, J.P. VERMA and J. JAYARAMAN
Division of Plant Pathology, Indian Agricultural Research Institute, New Delhi 110012
Keywords:
Cotton, population dynamics, phylloplane bacteria, biocontrol, Pseudomonas. Xanthomonas campestris pv. malvacearumAbstract
A cotton phylloplane bacteria (PI b) belonging to genus Pseudomonas was selected for intensive studies on the basis of its in vitro antagonistic activity against the most predominant and virulent race of Xanthomonas campestris pv. maLvacearum, the bacterial blight pathogen of cotton. Plb-29 was chosen for its multiplication ability on some Gossypium hirsutum genotypes. On G. ltirsutum lines viz., Acala-44, Stoneville 2B-S9, Stoneville 20 and I-lOB, Plb-29 could multiply both in presence and absence of pathogen. It was capable of reducing pathogen population drastically when co-inoculated with the pathogen by multiplying and heavily colonising the active multiplication sites of cotton leaves.
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