Synopsis The book provides thorough information about Mollicutes and their plant diseases. It covers up-to-date information on Mollicutes such as Mycoplasma, Spiroplasma, Phytoplasma with their introduction, evolution genomic, and phylogeny. List of names of different genera like Mycoplasma, Ureaplasma, Entomoplasma, Mesoplasma, Spiroplasma, Acholeplasma, Anaeoroplams, Asteroleplasma as well as Candidatus within the genus Mycoplasma and genus Phytoplasma are also given. Detailed information such as general characteristics, structure, important genera, metabolism, cell reproduction cycle, pathogenesis, mechanisms of pathogenicity, different diseases, host defenses, epidemiology, ecology, laboratory diagnosis; control and detecting methods of molliuctes are also given in this book. The book illustrates the information explicit through 39 figures. At the end of the book several references are given for further study.