This book deals with the following topic viz. Introduction, Review of literature, Material and methods, Results, Discussion, Summary, conclusion and suggestion for further work, References and the object of the research was To study molecular variability among 21 isolates of Rhizoctonia bataticola, and to find out source of resistance in soybean against charcoal rot. this work is pioneer for the study in soybean diseases in Soya state (MP).