Plant pathology is concerned with the study of diseases in plants including their causes, nature and effects. These diseases are generally caused by either active pathogens such as fungi, virus, viroid, etc. or by abnormal physiological conditions. Some of the major areas of study under plant pathology are disease etiology, pathosystem genetics, plant disease resistance, disease epidemiology among many others. This book includes some of the vital pieces of work being conducted across the world on various topics related to plant pathology. It elucidates the concepts and innovative models around prospective developments with respect to plant pathology. While understanding the long-term perspectives of the topics, the book makes an effort in highlighting their impact for the growth of the discipline. It is a complete source of knowledge on the present status of this important field.