1Centre for Advanced Studies in Plant Pathology, G.B. Pant Univ. Agri. & Tech., Pantnagar, 263145, India
ACRP on Spices, Department of Horticulture, College of Agriculture, Dr Balasaheb Sawant Konkan Krislu Vidyapeeth, Dapoli, 415712
In vitro antibiosis of 6 isolates of Pseudomonas fluorescens resulted in reduction of mycelial growth of Rhizoctonia solani and the inhibition zone ranged from 1.3 to 22.5 mm in different isolates on Kings-B medium Similarly. 3.3 to 12.0 mm inhibition zone was recorded on PDA. Sclerotial inactivation studies indicated thai pre-tieatment jf bacterial isolates to sclerotia for different lengths of time affected sclerotial viability in vitro Pie-treatment of sclerotia resulted in 3.3 to 100% inhibition in their germination after these were immersed in bacterial cell suspension of P fluorescens isolates for 1 min. to 4 weeks. In green house study, there was 17 7 to 100% reduction in rice sheath blight infection due to pre-treatment of sclerotia for 4 weeks in suspension of P fluorescens isolates
Antibiosis, Pseudomonas fluorescens, Rhizoctonia solani.
