Insecticides and pesticides are substances that are used to kill insects and control pests respectively. Insecticides involve the usage of ovicides against the eggs of the insects and larvicides against insect larvae. They are used in various sectors such as agriculture, medicine, industries, etc. They play an important role in increasing agricultural productivity. Insecticides are classified into two major groups, namely, systemic and contact insecticides. Systemic insecticides have residual and long term activity and contact insecticides are lethal or harmful to the insects when they come in direct contact with it. Pesticides are chemical and biological agents that block and kill pests. Some of the common types of pesticides are herbicides, insecticides, nematicides, molluscicides, piscicides and insect repellents. They also include rodenticides, bactericides and animal repellents. The topics included in this book on insecticides and pesticides are of utmost significance and bound to provide incredible insights to readers. It is compiled in such a manner, that it will provide in-depth knowledge in this area. This book is an essential guide for both academicians and those who wish to pursue this discipline further.