Plant diseases are a threat to agriculture and food production on a global scale. Significant yield losses have been recorded due to plant pathogens in most agriculture and horticulture crops. The effective management of these diseases is very difficult. As such, it is important to understand fundamental concepts of the management of plant diseases caused by bacteria. Bacteriology is a subdivision of microbiology and involves the documentation, description, and identification of bacteria. This book covers recent updates on the morphology, classification, genetics, ecology, and biochemistry of bacteria as well as the basic molecular concepts of bacteriology. This book has a futuristic approach and will help scholars understand the symptoms, mechanisms, and effective management of diseases caused by bacterial pathogens. This book is useful for students and researchers of plant sciences, botany, microbiology, pathology, agriculture science, veterinary science, medical science, and other allied areas.