The science of crop protection includes a vast array of subjects and Agricultural Entomology and Nematology are major among them. A firm conceptual grip on both the subject is required to succeed in the different competitive examination conducted by the Indian Council of Agricultural Research and other government or private agencies. As students of Crop protection sciences, we felt a dearth of books which are equally informative and easy to memorize at the same time. In this context, we stressed to design this book in such a way that students appearing in competitive exams can easily remember the basic concepts in the ‘MCQ format’ and also learn the additional yet valuable information and recent scientific advancements in ‘tabular and pointwise format’ provided in each chapter. The authors don’t recommend this book to use as a textbook, rather we suggest the students to build their conceptual framework from textbooks and use this book in a later stage of preparation as a ready reckoner and evaluate themselves. As the title of the book suggests, we left no stone unturned to make this book a complete guide for competitive examinations conducted by ICAR, UGC and UPSC in the field related to Entomology and Nematology.