Books playing a significant role in our life. Good books improve our knowledge, ideas, excellence of living. They tune up our intellectual behavior that makes our outlook broad. Books motivate us when we are conquered. They inspire us to work hard with hope and courage. Books enrich our experience and sharpen our intellect and hence we wrote this book which gives adequate and direct information about the plant diseases and their management practices. Plant pathology is the science which deals with the diseases of crop plants, their symptoms, causal organisms, growth, multiplication, morphology and physiological nature of causal organisms, their life cycle, Epidemiological factors which are favorable to the pathogens for causing diseases in crop plants, different modes of survival and dispersal and various methods of crop disease management practices viz., cultural, physical, chemical, biological and biotechnological methods. This book mainly deals with the diseases, symptoms and management practices of widely cultivated field crops and horticultural crops in India. It can be utilized by students, farmers, field workers and field supervisors who are involved in crop disease management practices. In addition to the disease management practices, the glossary of plant pathological terms have also been given in this book for easy understanding of the technical terms.