The scientific study of plant diseases is known as plant pathology. Diseases in plants can be caused by varied plant pathogens as well as environmental conditions. Some pathogens are nematodes, bacteria, fungi, viruses, viroids, protozoa and oomycetes. Natural processes such as hail, snow, frost and drought are a few environmental conditions which can cause disorders in plants. Plant pathology is also concerned with the identification of pathogens, disease etiology, economic impact, plant disease resistance, plant disease epidemiology and disease cycles. It is also used to observe the effects of plant diseases on humans and animals as well as for the management of plant diseases. The topics included in this textbook on plant pathology are of utmost significance and bound to provide incredible insights to readers. It will serve as a reference to a broad spectrum of readers. Coherent flow of topics, student-friendly language and extensive use of examples make this book an invaluable source of knowledge.