Abstract:Because of limitation of the Integrated Pest Mangagement(IPM) concept and social,economical, technical and organizational obstacles,the adoptive rate of IPM by farmers has been very low.The principles and methods of Ecological Pest Management(EPM) are proposed for development of IPM.In the paper,theory of sustainable agriculture,theory of EPM and niche theory were used to study the niche of rice sheath blight fungus.Principle of niche is one of important principles about EPM.Study on niche could provide app...