This book is anticipated to introduce plant pathology to undergraduate, post graduates and Ph.D. students. I hope that this book will prove useful to students preparing for competitive exam like ARS, NET, UPSC, PG entrance, ICAR Jrf, Srf and other State entrance Exam. We wish that student and various readers who relish working in the field of plant pathology will find the format of book, level and quantity of information contained in the book to be appropriate for easier learning and understanding. The wide spectrum information in various chapters with the addition of the terms related to chapter and concepts statements is presented in very concise manner. It is expected that the readers will find the format stimulating and conducive to learning and preparing themselves for competitive exams with confidence.