The Hypocreales (Fungi, Ascomycetes) include about
1000 species divided among manysexual (teleomorph) and
asexual (anamorph) genera (Rossman et al. 1999). Fusarium
is an anamorph genus of about 125 commonly accepted
species (but undoubtedly much larger), widely distributed
on plants and in the soil, which produce characteristic
banana-shaped macroconidia (Leslie & Summerell 2006). It
includes several economicallyimportant plant pathogens,