The present book “Key Notes on Entomology‎,‎ Plant Pathology and Microbiology” has been designed to fulfill this long felt need of students‎,‎ teachers‎,‎ researchers and aspirants of competitive examinations‎.‎ It is designed in such a way that give rapid‎,‎ easy access to the core materials in a short format which facilitates easily learning and rapid revision‎.‎ The book carries fundamentals of Entomology‎,‎ Plant Pathology and Microbiology‎.‎ The book is divided in two parts‎.‎ The Part A of the book is Key Notes on Entomology and the Part B of the book is on Key Notes on Plant Pathology and Microbiology‎.‎ The most recent information is provided along with a detailed list of references for further reading‎.‎