Biopesticides have readily available sources, they are effective and easily biodegradable, exhibit various modes of action, cheaper, inherently less toxic to humans and the environment. They do not leave harmful residues, and are usually more specific to target pests. The use of biopesticides is markedly safer for the environment and users, and more sustainable than the application of chemicals, and are therefore used as potential alternatives to synthetic pesticides, especially as components in Integrated Pest Management strategies. The book Biopesticides: Botanicals and Microorganisms for Improving Agriculture and Human Health is a collection of articles, up to date reviews and research contributions from both developed and developing countries. It emphasises the current issues of importance and the progress made in the fields of agricultural, environmental and soil microbiology, plant pathology and ethnobotany, and aims to bring together all available and relevant information on biopesticides. It comprises 12 Chapters on emerging issues on biopesticides from important and useful botanicals to beneficial microorganisms that show great potential in both agriculture and human health. The book will be of immense help to both the undergraduate and postgraduate students, biologists and agriculturists, who would like to broaden their knowledge and gain substantial experience about biopesticides in agriculture and health, this will enable them to contribute significantly in making the world a safer and healthier place.