Author(s):

K Murugavel and R Kannan

Abstract: Rice is a monocotyledonous annual grass which belongs to the family Gramineae and the genus Oryza. There is a continuous increase in the global demand for rice. Diseases are the significant limiting factors that affect rice production causing annual yield losses, conservatively estimated at the 5%. More than 70 diseases are caused by fungi, bacteria, virus and nematode on rice among which, Rice Sheath Blight disease is the most serious one. The use of chemical fertilizers and pesticides cause an incredible harm to the environment. These agents are both hazardous and may persist and accumulate in natural eco systems. These chemicals shall be replaced with biological approaches which are considered more environment friendly in the long term. Pseudomonas fluorescens common gram negative, rod shaped bacterium, is a major constituent of rhizobacteria, which encourages the plant growth through its diverse mechanisms. It encompasses a group of common, non pathogenic saprophytes that colonize soil, water and plant surface environments. In this present study the treatments viz., Pseudomonas fluorescens (Pf1) as seed treatment @ 10g/kg of seeds and foliar spraying of Pseudomonas fluorescens @ 0.2% on 30 and 45 DAT and Neem cake as soil application @ 250 kg/ha recorded the minimum disease incidence (12.12%) at harvest and maximum growth parameters of Rice.

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