Dr. R. G. PARMARCHAUDHARI JIGAR J.2020-06-222020-06-222018http://krishikosh.egranth.ac.in/handle/1/5810147821Rice(Oryza sativaL.) a cereal plant of the family Gramineae extensively cultivated in warm climate, especially in East Asia, producing seeds that are cooked and used as staple food. Rice is a plant of Asian origin. Rice crop is known to suffer from many biotic and abiotic stresses. Rice in general and irrigated rice in particular, is the target of attack by more than 100 species of insects and pathogenic organisms that known to destabilize the yields. The sheath rot has been prevailing in Middle Gujarat and South Gujarat since 1985 and increasing day by day. In some years, it caused major quantitative and qualitative losses. Also in some varieties it was low to moderate and severe in few fields of different districts in Middle Gujarat and South Gujarat.Considering the importance of rising problem of sheath rot disease, investigations on following aspects related to sheath rot disease was carried out on Isolation, purification and pathogenicity of Sarocladiumoryzaecausing sheath rot of rice s creening of rice varieties for resistance to the pathogen, estimation of soluble proteinprotein, total phenoland peroxidase activity of infected and healthy tissues and evaluation of fungicides against sheath rot of rice in vitro and in vivo.en-USnullThesis