Objective Agricultural Entomology is a comprehensive, exam-oriented resource designed to provide a clear and concise understanding of insect science with special reference to agriculture. The book systematically covers fundamental and applied aspects of entomology, including insect morphology, anatomy, physiology, taxonomy, ecology, behavior, and economic importance, along with detailed coverage of major insect pests of field crops, horticultural crops, and stored products. It emphasizes modern pest management strategies such as Integrated Pest Management (IPM), biological control, host plant resistance, and safe use of insecticides, while also incorporating recent advancements like biotechnology, pheromones, and semiochemicals. Additionally, applied areas such as apiculture, sericulture, lac culture, and veterinary entomology are included to highlight the broader role of insects in agriculture and rural economy. Presented in a structured and objective format, the book is highly useful for quick revision, concept building, and self-assessment. It is ideally suited for undergraduate and postgraduate students of agriculture, aspirants preparing for competitive examinations such as ICAR-JRF, SRF, NET, ARS, and other state-level agricultural services, as well as teachers, extension workers, and professionals seeking a reliable reference in agricultural entomology.