Agrochemicals play an important role in protecting the crops from pests and diseases and thus, increase the yield. The book begins with a detail descriptions of insecticides and other chapters related to pest control such as chemosterilants, radiational control, pheromonal control, attractants, repellents, antifeedants, neuropeptides, etc. The book also includes the chapters like fungicides, weedicides, chemical fertilizers, deficiency and nutrients and biofertilizers. In all there are 14 chapters. Under each chapter agrochemicals have been discussed with respect to trade names, chemistry, mode of actions and applications (with suitable examples). The chapters, biofertilizers, special interest. The book is ready notes for graduate and post-graduate students of agricultural universities and traditional universities.