Mohammad Ansar, PhD, is an Assistant Professor at the Department of Plant Pathology of Bihar Agricultural University (BAU), India. He established the Plant Virology Laboratory at BAU and acts as a coordinator of virology research. Dr. Ansar is also associated with a program in which he actively performs the research work of the All-India Coordinated Researches on vegetable crops. He has been the author or coauthor of many articles in research journals, book chapters, and conference papers. He has recently published an edited book, The Phytopathogen: Evolution and Adaptation. Abhijeet Ghatak, PhD, is an Assistant Professor of Plant Pathology at Bihar Agricultural University (BAU), India. He is a member of a core research group and research monitoring committee at the BAU, helping to provide appropriate direction and to prioritize research. Dr. Ghatak is also engaged in undergraduate and postgraduate teaching, covering courses related to principles of plant pathology, field and medicinal crop diseases, epidemiology, and forecasting.