This book contains eight sections ramifications including several chapters, first section is at the center of the scientific background of pesticides and names, Part II Ezra to the chemicals used to combat invertebrates, and section III around the chemicals used to combat Chordata, section IV talking about chemicals used against plants, Part V Ezra to the chemicals used in the fight against micro-organisms. In section VI Ezra on the legality of the use of pesticides, dangers, and finally Chapter VIII talks about pesticides future.