This is the first book to bring together a comprehensive account of global activities in biological control, providing a global overview of biological control programs and bringing together information from introduction biological control, conservation biological control, and augmentative biological control (including commercial use). Arthropod and pathogen natural enemies are treated, as well as challenges to discovering and developing new agents, modern approaches to assessing new agents for introduction/commercial production, socioeconomic aspects of biological control, successes by region and future prospects. This book provides a record of the types of organisms and main strategies used in biological control, key challenges confronting biological control in the 21st century, the main socioeconomic challenges that need to be addressed, biological control efforts around the globe and highlights important successes and failures, suggestions to move biological control forward in a changing world. Contributors are dedicated scientists and practitioners from around the world, together providing a global statement on the status of biological control.