Abstract

                                The viability of sheath blight organism was studied under various conditions. The organism lost its viability after two weeks when the infected plant debris were buried in garden land soil and wet land soll under flooded condition and also in cattle manure But under dry condition the viability was lost only after four weeks. When infected straw was heaped under taboratory condition, the pathogen lost viability only after 180 days. The viability of Sclerotia was completely lost within 60-90 days when stored in flooded soils as well as in paddy field water. Under dry conditior od percentage of sclerotia retained their viability even after 150 days.

Key words :