Biostimulants in Plant Protection and Performance provides the latest research on biostimulants, a diverse class of compounds that includes substances or microorganisms that are helpful in sustainable plant growth and development. These substances accelerate plant growth, yield, and chemical composition even under unfavorable conditions, and include nitrogen-containing compounds, humic materials, some specific compounds released by microbes, plants, and animals, various seaweed extracts, bio-based nanomaterials, phosphite, silicon, and more. Additionally, the book discusses new generation products and bioproducts that are being developed for sustainable plant growth and protection, including research updates in biotechnology, nanobiotechnology, and the protective role of biostimulants. As the use of new generation biostimulants can enhance plant production systems through a significant reduction of synthetic chemicals, such as pesticides and fertilizers, and even elicit plant tolerance to various climate change-related stresses, this book is a welcomed edition to many fields of study.