Besides the economic losses due to reduction in grain
yield, the main problem is the potential mycotoxin contamination
of wheat mainly with deoxynivalenol (DON) (McMullen et al.,
2012). During the last 50 years, several epidemics of FHB of varying
degrees of severity have occurred in Argentina and F. graminearum
‘‘sensu stricto” was isolated as the main pathogen associated with
FHB (Dalcero et al., 1997). In 1993, during a severe FHB outbreak,
the highest estimated losses reached 50% in areas with no-tillage
after maize crops.