“…The frequency of pionnotal forms and mycelial degeneration in the genus Fusarium differs both between and within species (Oswald, 1949; Snyder and Hansen, 1954; Snyder and Toussoun, 1965; Toussoun and Nelson, 1975; Puhalla, 1981). Such degeneration has been associated with changes in biochemistry, pathogenicity and toxigenicity (Tu, 1929; Ullstrup, 1935; Wellman and Blaisdell, 1941; Oswald, 1949; Cormack, 1951; Joffe, 1962; Bolton and Donaldson, 1972; Kirksey and Cole, 1974; Duncan and Bu'Lock, 1985; Awuah and Lorbeer, 1988; Wing et al., 1995).…”