Traditionally, there have been five major species of Fusarium responsible for fusarium head blight (FHB)
on wheat in the UK: Fusarium avenaceum (Gibberella avenacea), Fusarium culmorum,
Fusarium graminearum (Gibberella zeae), Fusarium poae and Microdochium nivale
(Monographella nivalis formerly Fusarium nivale). New species F. langsethiae has
recently been described which causes a discrete lesion on the glume similar to that casued by F. poae.
Each species is capable of infecting a crop on an individual basis or as part of a complex of species.