Mycology is a frontier area of research in life science. The genus Fusarium has been considered as one of the very interesting and important among fungi because of its diversity, cosmopolitan nature and wide range of plant diseases, human as well as animal toxicoses and mycoses. Fusarium species are filamentous fungi and are well distributed across many geographical regions and substrates. Taxonomy of the genus Fusarium is complex and difficult, partly because of the use of different taxonomic systems in different countries. In view of tremendous development in the field of mycology, the present book emphasizes various aspects in the field of Fusarium research. This volume comprises seven chapters with emphasis on general introduction, isolation of different Fusarium species from food grains, fruits and vegetables. It also focused on taxonomic study and mycotoxin production.