Fusarium species are ubiquitous in soils. They are
commonly considered as field fungi invading more than
50% of maize grains before harvest (Robledo-Robledo,
1991). Several phytopathogenic species of Fusarium are
found to be associated with maize including F.
verticillioides (Sacc.) Nirenberg, F. proliferatum
(Matsushina) Nirenberg, F. graminearum Schwabe and
F. anthophilum (A. Braun) Wollenweber (Lawrence et al.,
1981; Scott, 1993; Munkvold and Desjardins, 1997).
Among them, F. verticillioides is likely to be the most
common species isolated worldwide from diseased maize
(Munkvold and Desjardins, 1997). Doko et al. (1996)
reported F. verticillioides as the most frequently isolated
fungus from maize and maize-based commodities in
France, Spain and Italy. Likewise, Orsi et al. (2000) found
in Brazil that F. verticillioides was the predominant
Fusarium species on maize. In general in Africa, very
little information is available on F. verticillioides
occurrence on maize. Reports of surveys conducted in
some African countries however showed it as the most
prevalent fungus on maize (Marasas et al., 1988; Allah
Fadl, 1998; Baba-Moussa, 1998; Kedera et al., 1999).
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