In the recent years awareness among people about use of medicinal plants has been increased. Recently farming of medicinal plants has also been started at various plants in India but there is no more information is available on diseases of medicinal plants in the form of book. Researchers in India and abroad worked on various diseases of medicinal plants, but the publications have restricted only up to the research journals. Hence, to produce a book of such an interesting matter of diseases of medicinal plants. The data about use of medicinal plants is available from all parts of the world. But scanty information is available about the health of medicinal plants. So to elaborate and spread the knowledge of such neglected but interesting information of diseases of medicinal plants the book is constructed. Various viral bacterial and fungal diseases of plants because greater loss of health of medicinal plants takes place due to fungal pathogens. Hence only the diseases of medicinal plants caused by fungi have been noted. Still today there is no information is available about the management of diseases of medicinal plants. This is a book not only for the Botanists, but also useful for the Agriculturist, Pharmacologist, Researchers and students of Plant pathology. The pathology of medicinal plants has not yet been studied more .This book will definitely create awareness about the study and management of diseases of medicinal plants.