This book is based on research in Lab and Field conditions which emphasize comprehensive studies on Management of Collar rot of Chickpea by Trichoderma isolates including chemical and biological means and very helpful for Researchers. The all aspects of pathogen and host interaction related to this disease are precisely studied without any manipulation. This research has been done under the supervision of eminent scientist Dr. J. P. Upadhyay who has great work on Trichoderma sp. and gave his important contributions as Instructor and Researcher in Dr. Rajendra Prasad Central Agricultural University Pusa Samastipur. Readers and researchers can get huge benefits from this Research Book. During research work it was very tedious to explore literature on collar rot disease of chickpea due to very few research work being performed as the pathogen causes minor disease in the chickpea that is why it was to less attention towards this disease and we have given great attention to collar rot. I was not alone in this journey, to accomplish this Hercules task which is one of my delightful moments of life. I am thankful to all those who helped me a lot to cross the way, in completing this work.