Vitamin requirements of Fusarium oxysporum f. sp. vasinfectum.

The effect of eight water-soluble vitamins on germination, germ-tube extension, growth, and sporulation of Fusarium oxysporum Schl. f.sp. vasinfectum (Atk.) Snyder and Hansen, was studied. Each vitamin was utilized in eight different concentrations. The fungus responded favourably to all of the utilized vitamins in almost all the concentrations where germination, growth, and sporulation were substantially greater than the controls. Among the vitamins used, the fungus appeared to be highly sensitive to thiamine and pyridoxine, moderately sensitive to inositol and pantothenate, and least affected by folic acid.