Synopsis The dependence on synthetic pesticides has increased substantially after the advent of green revolution in India to sustain the increasing demand for food production for the burgeoning population. The un-realistic and injudicious use of synthetic pesticides for the past several years led to the outbreaks of many insect and non-insect pests. There has been realization on the importance of use of non-synthetic pesticidal approach for managing the pests in general and insects in particular. The spurt of reports from the last one decade on the feasibility of use of biological based plant protection avenues viz., plant products, bio-control agents and pheromones, have opened the scope for the search of more  efficient tactics to tackle the pest menace. One of such approaches is to use an efficient pest monitoring system based on the pheromones. The pheromone system is further developed in to a management tool through mass trapping and communication disruption techniques and found productive in many crops. Pheromones for a few of the insect pests have been identified, synthesized and successfully field-tested during the past decade in India. There is yet a lot of scope to work on different aspects of use of pheromone technology for its optimal use. Even in colleges of higher studies, there is not much importance given to basic and applied aspects of the pheromones in agriculture and other allied subjects. This book "Pheromones: Principles and Practices" has been designed in such a way that a comprehensive syllabus on this subject is conceived and developed for the use of the students of both undergraduate and postgraduate, as well as for those engaged in the basic and applied research and field application of the pheromones. This book encompasses all the pheromones of the living species of both animal and plant kingdom details on sources of production, location of glands, method to collect and test for confirmation are given.