This book provides new insight and a better understanding of nanotechnology in mitigating crop biotic stresses.It covers crop diseases and different nano-based management strategies used to manage pathogens and plant-parasitic nematodes damaging crops. Nanoparticles have the potential to revolutionize crop yield and can control plant biotic stress. Nanotechnology in plant pathology is a new frontier among various nanotechnological applications. Nanotechnology applications include the development of nano-based pesticides and nanoformulations of chemicals for crop improvement by reducing biotic stress. Different nanomaterials like ZnONPs, SiO2NPs, CuONPs, AgNPs, and TiO2NPs have been examined for their impacts on plant growth and biotic stress management. This book deals with the advanced use of nanotechnology in managing the biotic stress of crops and improving crop production. It covers these issues and many more. Each chapter focus on one particular topic. Incorporate chapters provide detailed information on nanotechnology and may help in future research. This book will be useful for researchers, professors, and postgraduate and undergraduate students, especially concerning agriculture and plant pathology.