This book provides a unique and current look at the process of discovery in the field of crop protection. As many plants are able to resist various control agents, it is necessary to look for entirely new active types of compounds. The book examines combinatorial chemistry approaches, long used in medicinal discovery, to find new agrochemical types. Applications in modifying plants to provide their own crop protection or enhanced yield and quality are discussed. There is also a review of natural products, which are finding increased use in the development of new means and types of crop control agents.