Wheat and barley seed treated with triadimenol+imazalil at three rates, (recommended, half-recommended, and twice recommended), and barley seed treated with imazalil in ethanol at three rates, was stored for 15 months at ambient temperature in the laboratory. At the recommended rates (15 + 5 g a.i./100 kg seed for triadimenol + imazalil and 6.25 g a.i./100 kg seed for imazalil in ethanol), germination over the 15 months of storage did not differ from that of untreated seed. There were no significant differences in field emergence after 3, 9, 12, and 15 months of storage. At twice the recommended rate, triadimenol + imazalil reduced barley germination after 12 months storage because of an increased number of abnormal seedlings. Field emergence was also significantly reduced. Seedling vigour, as determined by plumule length, did not differ for imazalil in ethanol treatments, but was reduced in both wheat and barley by all application rates of triadimenol + imazalil.