Intended for field use by agricultural technicians and maize farmers, this pocket-size manual carries descriptions and color photographs for more than 50 fungal, bacterial, viral, and mollicute diseases that affect the maize crop worldwide, with basic information on pathogens and symptoms. A diagnostic key facilitates quick identification of diseases and their effects. In this fourth edition, nomenclature has been updated. new diseases and information added, and improved photographs included.119 pages