The document summarizes plant pathogenic bacteria. It discusses the history of bacteria discovery from Leeuwenhoek to Koch. It describes bacterial cell structure including the cell envelope, cell wall, plasma membrane, flagella, pili, cytoplasm, and inclusion bodies. It covers bacterial morphology like shape, size, grouping. It classifies plant pathogenic bacteria and discusses their asexual reproduction methods like binary fission, endospores, cysts, fragmentation, arthospores, and conidia.