Chemical Manipulation of Crop Growth and Development presents a critical review of the plant growth regulators in field crops. It discusses the strategies to discover plant growth regulators for agronomic crops; the methods of modifying stomatal movement; and the possible use of chemicals for photorespiration control. Some of the topics covered in the book are the hormonal control of photosynthesis and assimilate distribution; manipulation of crop growth by ethylene and some implications of the mode of generation; genetic and chemical manipulation of crops to confer tolerance to chemicals; and effects of allelochemicals on crop growth and development. The control of development of potato plant by using endogenous and exogenous growth regulators is covered. The analysis of crop physiology to assess plant growth regulation in sugar beet is also discussed. An in-depth analysis of the influence of auxin antagonists on pod and seed number is provided. The effect of foliar applications of synthetic plant growth regulators on the agronomic characteristics of field-growth corn is presented. A chapter is devoted to the use and effect of cerone in developing winter barley. The book can provide useful information to farmers, botanists, students, and researchers.