Fundamentals of Nematology (as per the ICAR Sixth Deans’ Committee syllabus) is a comprehensive and systematically organized textbook that provides a clear understanding of nematodes, their biology, diversity, and immense significance in agriculture, with a balanced emphasis on both fundamental concepts and applied aspects such as plant parasitism, host–nematode interactions, nematode-induced diseases, and integrated management strategies; the book begins with the historical development and economic importance of nematology, progresses through taxonomy, morphology, anatomy, and life processes, and culminates in practical insights into major plant-parasitic nematodes like root-knot, cyst, lesion, and reniform nematodes, making it an essential academic resource; written in a simple, student-friendly style while maintaining scientific rigor, the book is ideally suited for undergraduate and postgraduate students of agriculture, horticulture, and plant protection ; it is equally valuable for teachers, researchers, extension workers, and field practitioners who require a concise yet authoritative reference on nematology, thereby serving as a foundational as well as practical guide for understanding and managing nematode problems in modern agriculture.