*Coconut Research Station, Veppankulam, Tamil Nadu Agricultural University, Coimbatore.
Department of Plant Pathology Faculty of Agriculture, Annamalai University, Annamalainagar, 608 002, Tamil Nadu, India E-mail: muthu78ap@yahoo.co.in
Pseudomonas fluorescens isolate (1–12) were collected from the rhizosphere soil and tested for their efficacy against Rhizoctonia solani causing sheath blight of rice and Pythium sp, causing damping-off of chilli. Among the 12 isolates, P. fluorescens 3 and 4 were very effective in inhibiting the mycelial growth of R. solani and Pythium sp. All the 12 isolates of P. fluorescens were tested for (he production of siderophore, salicylic acid and HCN. The isolates of P. fluorescens 3 and 4 alone showed higher production of siderophore, salicylic acid and hydrogen cyanide.
Hydrogen cyanide, Pseudomonas fluorescens, Pythium sp., Rhizoctonia solani, salicylic acid, siderophore
