The Poaceae are one of the most important plant families in terms of the number of species, worldwide distribution, ecosystems and as ingredients of human and animal food. They support many parasites including more than 100 severely pathogenic virus species. In this book, taxonomic and agronomic descriptions of the Poaceae are presented, followed by data on molecular and biological characteristics of the viruses and descriptions up to species level. Virus diseases of field grasses (barley, maize, rice, rye, sorghum sugarcane, triticale and wheats), forage, ornamental, aromatic, wild and lawn Gramineae are largely described and illustrated (32 colour plates). A detailed index of viruses and taxonomic lists will help readers in their search for information.Foreworded by Marc Van Regenmortel, this book is essential for anyone with an interest in plant pathology especially plant virology, entomology, breeding and forecasting. Agronomists will also find this book invaluable.The book was coordinated by Hervé Lapierre, previously a researcher at the Institut National de la Recherche Agronomique (Versailles, France) and Pierre A. Signoret emeritus professor and formerly head of the plant pathology department at Ecole Nationale Supérieure Agronomique (Montpellier, France). Both have worked from the late 1960's on virus diseases of Poaceae.