Pathogen resistance to fungicides has become a challenging problem in the management of crop disease. It has threatened the performance of some highly potent commercial fungicides, resulting in resistance to more than one hundred different active ingredients reported from around the world. This book compiles information on fungicide resistance over the past three decades, beginning with the history of resistance development, then exploring the status, detection and management of resistance in pathogens to different groups of fungicides with diverse case studies from countries including France, India, Italy, Japan and the US. It also discusses the genetics of resistance and the problem of multidrug resistance, before concluding with an overview of the work and initiatives of the Fungicide Resistance Action Committee for managing this problem. An essential resource for researchers and students of plant pathology and mycology, this book is also a useful collection of the present status and future projections of fungicide resistance for extensions workers and pesticide industry personnel.