Volatile, or essential, oil crops yield a wide range of products - fresh and dried herbs, oils and oil components. An increase in demand for these products over recent years has resulted in a large amount of scientific and technical literature on the subject. This book draws together much of this literature, and examines the major species of crop, the production and use of oils and analyzes the economics of the world trade in volatile oils. It covers all aspects of the subject from basic botany, physiology and biochemistry of the major species to the production and use of the oils. The book is aimed at postgraduate and professional readers.