This is Volume 2 of a two-volume set that examines the impact of viral diseases in horticultural systems. Building on Volume 1, which focuses on vegetables, this volume shifts attention to fruit crops, offering a broader and more complete view of the viral threats affecting global food and nutritional security. This book is a part of the 'Plant Pathology for Sustainable Agriculture' book series. The book discusses how viruses compromise fruit crop health, yield, and market value, especially under the pressures of climate change and increasing consumer demand. It covers the biology and spread of fruit viruses, the critical role of insect vectors, and the economic implications of outbreaks. Readers will gain insights into modern diagnostics using CRISPR and field-ready kits, as well as omics-based approaches (proteomics, metabolomics, epigenetics) that help decode host-pathogen interactions. It further explores futuristic technologies like nanotechnology, artificial intelligence, and IoT for smart surveillance, disease forecasting, and post-harvest disease control. This volume is ideal for fruit growers, plant biotechnologists, researchers, students, and agri-tech innovators seeking up-to-date strategies for virus detection and sustainable disease management in fruit crops.