Citrus fruit, originating in Southeast Asia, have been cultivated and enjoyed for over 4000 years. Moreover, they are grown in nearly every country within 40°north-south latitude, the major producers being China, Brazil, the USA, and countries bordering the Mediterranean. This new edition continues to adopt an international perspective on citrus, covering its biology and cultivation as well as considering issues in the citrus industry and providing examples from around the world. The authors include discussion on important topics such as biotechnical advances in citrus genetics, current techniques in breeding, the role of climatic factors in worldwide production, the importance of rootstocks, plant husbandry, pests and diseases, and postharvest technology. They emphasize current theories and technological advances in citriculture, citing specific examples of how they are used and in which regions. Citrus 2nd edition describes the scientific basis of production practices and is aimed at professionals in the industry as well as advanced students of horticulture and allied disciplines within plant science and food science.