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The present edition is limited to the study of insects, related forms, nematodes and plant pathogens. The book discusses the nature and control of these pests in as simple and concise a fashion as possible. Technical expressions and purely academic material have been kept to a minimum wherever possible; however, no science is simple and certain technical terms or expressions must be understood in order to comprehend information and developments in a given field. Agricultural production has become a highly technical profession and much more than manual dexterity and a strong back are required for success. New knowledge, new pesticides, new concepts of pest control and greater concern with environmental preservation have greatly changed plant protection efforts in recent years. The need for a unified and integrated approach to pest control practices has become more apparent. Growers must now give greater consideration to environmental and public health impact of their practices. This book attempts to unify and integrate the knowledge in the fields covered. The last seven chapters of the book covering control practices and pesticide application are common to all phases of pest control. The questions at the end of each chapter are presented to stimulate logical reasoning and discussion. The students should be encouraged to reason from the known facts. For more detailed information the references cited at the end of this book and experiment or extension service literature should be consulted. Brief Contents: The External and Internal Structure of Insects • The Development of Insects • The Seasonal Life History of Insects • The Classification of Insects • Harmful Invertebrates Other Than Insects • The Nematode Worms • Plant Diseases • Causes of Plant Diseases • The Annual Life History of Pathogens • Viruses and Physiopaths as the Cause of Plant Diseases • The Techniques of Pest Control • The Chemical Pesticides-I • The Chemical Pesticides-II • Pesticide Legislation • Application Equipment-I • Application Equipment-II • Selection, Care and Manipulation of Application Equipment • Addendum • Glossary • Index.