The negative impact of chemical pesticides on human wellbeing and the environment has encouraged the development of eco-friendly alternatives for the management of plant pathogens. However, only a small number of microbial biocontrol agents (mBCAs) have been developed, registered and used in the management of plant diseases. This book analyses the deployment of mBCAs for the development of novel microbial biopesticides, considering the main plant-beneficial traits, procedures needed for effective formulations and the processes used for their validation. To guide the readers through the world of microbial biopesticides, the book starts with a chapter dedicated to the regulations that need to be followed for the development of final products. Readers will understand the importance of formulation and mode of action of mBCAs in developing microbial biopesticides. They will become familiar with key mBCAs such as Ampelomyces quisqualis, Bacillus spp., Trichoderma spp., and Pseudomonas spp., understanding the importance of formulation for their application in the field. This book explains the use of mBCAs to control post-harvest diseases and the potential of endophytic microorganisms as next-generation microbial biopesticides. A final chapter provides a useful workflow for the selection of new mBCAs and describes microbial species including promising mBCAs that might be developed as new microbial biopesticides.- Gives useful insights into the practicalities of regulation of mBCAs- Describes the underlying biology that it is critical to developing mBCAs- Provides case studies for key mBCA species - Indicates microbial species exploitable for the development of new microbial biopesticides For students and researchers involved in crop protection and biological control