The present book aims to provide a concise, up-to-date reference book on most aspects of citrus biology. Citrus is second only to the grape (the largest area of which is planted for wine) as a fruit crop and has been the subject of many studies. Six volumes of Citrus Industry issued by the University of California, dealing in detail with many aspects of citrus, have been published since 1967. Important information can be gathered also from the Proceedings of International Congresses of Citriculture. Our book provides an introduction to and overview of underlying principles and findings of citrus biology and culture. However, some important topics may have been omitted or treated too briefly. Emphasis has been placed on up-to-date treatment and conceptions of citrus physiology, reproductive development, taxonomy, genetics and breeding. The extensive references accompanying each chapter, including recommended reading, will be helpful to the reader, though they are of course, far from complete. Illustrations have been provided throughout to accompany the text.

Certain prominent up-to-date aspects of cultivated citrus are contained in a separate chapter devoted to the subject. The book also contains a contribution by Prof. D. Rosen, of the Faculty of Agriculture, the Hebrew University, on citrus pests, which has been specifically written for this book. The book will be useful to undergraduates, as well as to students in advanced courses, specializing in citriculture and horticulture. An understanding of elementary plant sciences is being assumed.