Wheat grain was collected from silos of the Grain Handling Authority of New South Walesfrom 1978 to 1981. Alternaria alternata was the fungus most commonly isolated from both discoloured and non-discoloured grain. Pyrenophora triticirepentis was recovered from a relatively high proportion of pink grain in 1978 and from discoloured grain in 1979. However, it was not recovered in 1980 or 1981. Isolates from five other genera, Bipolaris, Curvularia, Epicoccum, Fusarium and Penicillium, were recovered from less than 5% of all grains.